| Description | Date | Identifier | |
| Quarterly report summarizing vehicle defects, causes, and statistics for various system faults. | 30th Sep 1936 | Box 130 \ 4 scan0079 | |
| Summary report of vehicle faults over a six-month period, with totals and remarks. | 30th Sep 1936 | Box 130 \ 4 scan0080 | |
| Summary of vehicle faults and complaints categorized by issue over a six-month period. | 30th Sep 1936 | Box 130 \ 4 scan0081 | |
| Summary report detailing various vehicle defects, including numbers and remarks, over quarterly and multi-month periods. | 30th Sep 1936 | Box 130 \ 4 scan0082 | |
| Faults found for defective shock dampers and loose steering boxes over specific time periods, with quantities and remedial actions. | 30th Oct 1936 | Box 130 \ 4 scan0083 | |
| Requesting data on Bentley 4¼ litre clutch complaints, specifically regarding propeller shaft dampers and recurrent issues. | 30th Oct 1936 | Box 130 \ 4 scan0084 | |
| Personnel arrangements for quarterly complaint and depot work in France and England. | 18th Dec 1936 | Box 130 \ 4 scan0085 | |
| Covering memo regarding the issuance of quarterly instructions to drivers. | 30th Dec 1936 | Box 130 \ 4 scan0086 | |
| Clarifying that quarterly instructions are for demonstration drivers and not applicable to testers. | 31th Dec 1936 | Box 130 \ 4 scan0087 | |
| Itemised list of additional quarterly complaints with remarks on specific issues. | 31th Dec 1936 | Box 130 \ 4 scan0088 | |
| Tabulated list of numbered entries with codes, measurements, and remarks on faults or status. | 31th Dec 1936 | Box 130 \ 4 scan0089 | |
| Tabulated log detailing vehicle checks, measurements, and fault remarks. | 31th Dec 1936 | Box 130 \ 4 scan0090 | |
| Numbered list of engine faults or observations with corresponding codes and measurements. | 31th Dec 1936 | Box 130 \ 4 scan0091 | |
| Tabulated log detailing component data, readings, and fault remarks for various units. | 31th Dec 1936 | Box 130 \ 4 scan0092 | |
| List detailing specifications in Litres for numbered items (77) to (87), page 6. | 14th Jan 1937 | Box 130 \ 4 scan0093 | |
| Letter providing detailed information on seized brake components for a quarterly complaints report. | 14th Jan 1937 | Box 130 \ 4 scan0094 | |
| Cover letter for a quarterly report detailing customer complaints and rectifications for the 20/25 HP, 25/30 HP, Phantom II, and Phantom III chassis. | 10th Feb 1937 | Box 130 \ 4 scan0095 | |
| Quarterly complaints report from December 1936 detailing brake issues across different car models. | 1st Dec 1936 | Box 130 \ 4 scan0096 | |
| Summary report of vehicle brake complaints, broken down by issue and model over six months. | 1st Dec 1936 | Box 130 \ 4 scan0097 | |
| Quarterly statistical report on customer complaints for inefficient brakes, servo issues, and clutch problems across various car models. | 1st Dec 1936 | Box 130 \ 4 scan0098 | |
| Quarterly report detailing customer complaints for clutch, dynamo, and exhaust systems across different vehicle models. | 20th Jun 1936 | Box 130 \ 4 scan0099 | |
| Summary report on vehicle faults including exhaust, engine, and valve issues over a six-month period. | 20th Jun 1936 | Box 130 \ 4 scan0100 | |
| Statistical report on hydraulic system complaints, broken down by type and model, over a six-month period. | 20th Jun 1936 | Box 130 \ 4 scan0101 | |
| Summary report of vehicle faults and complaints categorized by model and time period, with remarks and handwritten notes. | 20th Jun 1936 | Box 130 \ 4 scan0102 | |
| Quarterly report summarizing vehicle faults, complaint counts, and repair remarks for various models. | 20th Jun 1936 | Box 130 \ 4 scan0103 | |
| Quarterly report detailing vehicle failures by model and type, with remarks and handwritten notes. | 20th Jun 1936 | Box 130 \ 4 scan0104 | |
| Summary report of vehicle failures by type and model over quarterly and six-month periods. | 20th Jun 1936 | Box 130 \ 4 scan0105 | |
| Summary report on vehicle faults and their remedies for various models. | 20th Jun 1936 | Box 130 \ 4 scan0106 | |
| Quarterly report detailing defects for Stromberg carburettors, regulators, tappets, and plugs across different engine models. | 11th Feb 1937 | Box 130 \ 4 scan0107 | |
| Classification of quarterly complaints for 3½ litre and 4¼ litre Bentley chassis. | 11th Feb 1937 | Box 130 \ 4 scan0108 | |
| Quarterly report from December 1936 detailing customer complaints about vehicle brakes. | 1st Dec 1936 | Box 130 \ 4 scan0109 | |
| Statistical report on various brake system faults and their remedies over a six-month period. | 1st Dec 1936 | Box 130 \ 4 scan0110 | |
| Complaints about brake squeaks and clutch issues for 3 1/2 and 4 1/4 litre models over two quarters. | 1st Dec 1936 | Box 130 \ 4 scan0111 | |
| Quarterly report summarizing vehicle faults, their frequency by engine size, and the corresponding remedies. | 1st Dec 1936 | Box 130 \ 4 scan0112 | |
| Statistical report on vehicle faults categorized by component and engine type. | 1st Dec 1936 | Box 130 \ 4 scan0113 | |
| Quarterly report on common vehicle faults and their respective counts and remarks. | 1st Dec 1936 | Box 130 \ 4 scan0114 | |
| Quarterly report detailing vehicle faults for 3½ and 4¼ Litre models, including noisy axles, oil leaks, and rattles. | 1st Dec 1936 | Box 130 \ 4 scan0115 | |
| Quarterly report summarizing vehicle component failures and remedial actions. | 1st Dec 1936 | Box 130 \ 4 scan0116 | |
| Statistical report on vehicle faults like engine rattle, dynamo issues, and steering problems over a six-month period. | 1st Dec 1936 | Box 130 \ 4 scan0117 | |
| Quarterly report on vehicle complaints, categorized by fault type and engine size. | 1st Dec 1936 | Box 130 \ 4 scan0118 | |
| Quarterly report detailing vehicle component failures and defects across two engine types. | 1st Dec 1936 | Box 130 \ 4 scan0119 | |
| Quarterly report page detailing vehicle faults with numerical data and handwritten commentary. | 1st Dec 1936 | Box 130 \ 4 scan0120 | |
| Fault report summary detailing rear axle, engine, and bearing issues for 3½ and 4¼ Litre models. | 12th Mar 1937 | Box 130 \ 4 scan0121 | |
| From Sg. to Gry. regarding a request for Hancock's report on Bentley Quarterly Complaints. | 12th Mar 1937 | Box 130 \ 4 scan0122 | |
| Summary report of component failures and remarks for different engine litreages over six months. | 12th Mar 1937 | Box 130 \ 4 scan0123 | |
| Quarterly report detailing vehicle faults for 3 1/2 and 4 1/4 Litre models with remarks. | 12th Mar 1937 | Box 130 \ 4 scan0124 | |
| Report tabulating component failures over a six-month period for 3 1/2 Litre and 4 1/4 Litre models. | 12th Mar 1937 | Box 130 \ 4 scan0125 | |
| Fault report for the March quarter detailing issues with dynamo coupling rattles and low oil pressure. | 21th Apr 1937 | Box 130 \ 4 scan0126 | |
| Quarterly report on customer complaints and repair work for 3.5 and 4.25 litre Bentley chassis for the quarter ending March 1937. | 21th Apr 1937 | Box 130 \ 4 scan0127 | |
| Quarterly report for March 1937 analysing customer complaints about various brake issues. | 31th Mar 1937 | Box 130 \ 4 scan0128 | |
| Faults and remarks related to car brakes over a six-month period, categorized by issue. | 31th Mar 1937 | Box 130 \ 4 scan0129 | |
| Quarterly report summarizing vehicle faults related to brake squeaks and clutch issues for 3 1/2 and 4 1/4 Litre models. | 31th Mar 1937 | Box 130 \ 4 scan0130 | |
| Summary report detailing vehicle faults and remedies over a six-month period for 3 1/2 and 4 1/4 litre models. | 31th Mar 1937 | Box 130 \ 4 scan0131 | |
| Report summarizing vehicle component faults and remarks over a six-month period, categorised by litre capacity. | 31th Mar 1937 | Box 130 \ 4 scan0132 | |
| Summary of vehicle faults over a six-month period, categorized by issue and engine size. | 31th Mar 1937 | Box 130 \ 4 scan0133 | |
| Summary table of vehicle defects over a six-month period, categorized by issue and engine size. | 31th Mar 1937 | Box 130 \ 4 scan0134 | |
| Quarterly statistical report on vehicle faults, comparing 3½ and 4¼ litre models. | 31th Mar 1937 | Box 130 \ 4 scan0135 | |
| Summary report of vehicle complaints over two quarters, detailing issues and providing remarks. | 27th Apr 1937 | Box 130 \ 4 scan0136 | |
| Requesting information on fixes for 7 cases of noisy 25/30 axles. | 27th Apr 1937 | Box 130 \ 4 scan0137 | |
| Summary of quarterly complaints regarding Phantom III hydraulic jacks and 25/30 HP rear axles. | 27th Apr 1937 | Box 130 \ 4 scan0138 | |
| Noisy over-run issue on chassis GAN-3, resolved by changing the complete axle. | 27th Apr 1937 | Box 130 \ 4 scan0139 | |
| Quarterly complaints of steering knocks on the Phantom III model. | 28th Apr 1937 | Box 130 \ 4 scan0140 | |
| Complaints of shock damper knocks, requesting details for investigation. | 30th Apr 1937 | Box 130 \ 4 scan0141 | |
| Cover letter for the quarterly complaints report concerning 20/25 HP, 25/30 HP, Phantom II, and Phantom III chassis for the quarter ending March 1937. | 23th Apr 1937 | Box 130 \ 4 scan0142 | |
| Quarterly report from March 1937 detailing customer complaints about vehicle brakes. | 31th Mar 1937 | Box 130 \ 4 scan0143 | |
| Quarterly report detailing customer complaints and remarks regarding various brake system faults. | 31th Mar 1937 | Box 130 \ 4 scan0144 | |
| Statistical report on servo and clutch complaints for a six-month period including the March quarter. | 31th Mar 1937 | Box 130 \ 4 scan0145 | |
| Customer complaints for various vehicle models over a six-month period. | 31th Mar 1937 | Box 130 \ 4 scan0146 | |
| Quarterly report summarizing customer complaints by vehicle model and fault type. | 31th Mar 1937 | Box 130 \ 4 scan0147 | |
| Summary report on hydraulic system faults for various models over a six-month period. | 31th Mar 1937 | Box 130 \ 4 scan0148 | |
| Statistical report on vehicle complaints, categorised by model and fault type, with remarks on causes and resolutions. | 31th Mar 1937 | Box 130 \ 4 scan0149 | |
| Summary report detailing vehicle component failures over two quarters for various models. | 31th Mar 1937 | Box 130 \ 4 scan0150 | |
| Summary report of vehicle faults by model over two quarters, including remedies. | 31th Mar 1937 | Box 130 \ 4 scan0151 | |
| Quarterly report summarizing vehicle faults and modifications across different models. | 31th Mar 1937 | Box 130 \ 4 scan0152 | |
| Quarterly report analyzing customer complaints and defects for S.U. petrol pumps, engine over-oiling, Stromberg carburetters, and faulty regulators. | 31th Mar 1937 | Box 130 \ 4 scan0153 | |
| Statistical report on vehicle faults and complaints by model over two quarters. | 31th Mar 1937 | Box 130 \ 4 scan0154 | |
| Quarterly report detailing failures of hydraulic jacks and front axle control rattles across various models. | 5th May 1937 | Box 130 \ 4 scan0155 | |
| Investigating a discrepancy in the number of reported complaints about shock damper knocks. | 5th May 1937 | Box 130 \ 4 scan0156 | |
| Quarterly report detailing complaints of shock damper knocks for Phantom III and 25/30 HP chassis. | 3rd May 1937 | Box 130 \ 4 scan0157 | |
| Cover memo attaching a copy of another memo regarding complaints on new cars. | 2nd Jun 1937 | Box 130 \ 4 scan0158 | |
| Complaints and faults found on new cars, including Phantom III and Bentley models. | 31th May 1937 | Box 130 \ 4 scan0159 | |
| Performance issues and proposed solutions for several vehicle models including the Phantom III and 25/30 HP. | 3rd Jun 1937 | Box 130 \ 4 scan0160 | |
| Complaints about the difficulty of accessing and repairing parts on the Phantom III chassis. | 3rd Jun 1937 | Box 130 \ 4 scan0161 | |
| Various mechanical issues and suggestions for improvement on vehicle components. | 21th Jun 1937 | Box 130 \ 4 scan0162 | |
| Difficulty of dismantling the clutch on a Phantom III, requiring the engine to be raised. | 21th Jun 1937 | Box 130 \ 4 scan0163 | |
| Introduction of a new color-coded form system for handling customer complaints. | 29th Jun 1937 | Box 130 \ 4 scan0164 | |
| Outlining the procedure for reporting on complaints, including costs, owner communication, and a new scheme. | 29th Jun 1937 | Box 130 \ 4 scan0165 | |
| Blank Owner's Complaint Report form for a Phantom III vehicle. | 2nd Sep 1937 | Box 130 \ 4 scan0166 | |
| Proposal outlining a new procedure for handling and preventing in-service failures across four key departments. | 2nd Sep 1937 | Box 130 \ 4 scan0167 | |
| The objective of discussions to learn from mistakes and prevent future faults. | 2nd Sep 1937 | Box 130 \ 4 scan0168 | |
| Arrangements for wind tunnel tests on radiators to investigate a boiling complaint on the 40/50 Phantom II model. | 14th Feb 1931 | Box 131 \ 1 scan0001 | |
| Radiator tests conducted at Brooklands, comparing hexagonal and square tube radiators. | 19th May 1931 | Box 131 \ 1 scan0002 | |
| The comparison of hexagon and square radiator tubes and bonnet ventilation systems. | 19th May 1931 | Box 131 \ 1 scan0003 | |
| Additional efficiency gains from radiator modifications and the necessity of a wind tunnel for tube design development. | 19th May 1931 | Box 131 \ 1 scan0004 | |
| Water flow tests on an SS.15 unit, comparing four different radiator configurations. | 21th Apr 1931 | Box 131 \ 1 scan0005 | |
| Comparison of radiator boiling temperatures for different matrix types at various speeds. | 21th Apr 1931 | Box 131 \ 1 scan0006 | |
| Test report comparing boiling temperatures for different bonnet ventilation types at various speeds. | 19th May 1921 | Box 131 \ 1 scan0007 | |
| Graph comparing the performance of different radiator types against engine RPM. | 19th May 1921 | Box 131 \ 1 scan0008 | |
| Comparison table of radiator performance and specifications for the 19 E.X. Car. | 21th Apr 1931 | Box 131 \ 1 scan0009 | |
| Placeholder note for photostats, directing to the original document. | 19th May 1931 | Box 131 \ 1 scan0010 | |
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