| Description | Date | Identifier | |
| Vehicle faults, their frequency over quarterly and six-month periods, and specific case remarks. | 31th Mar 1936 | Box 130 \ 1 scan0373 | |
| Quarterly report detailing vehicle faults, including issues with petrol consumption, carburettor, gearbox, and electric clock. | 31th Mar 1936 | Box 130 \ 1 scan0374 | |
| Quarterly report detailing vehicle faults, their frequency, and the corrective actions taken. | 31th Mar 1936 | Box 130 \ 1 scan0375 | |
| Recurring faults including noisy front axles, defective thermostats, noisy tappets, and noisy magnetos. | 1st Apr 1936 | Box 130 \ 1 scan0376 | |
| Vehicle faults with corresponding data tables and notes over a six-month period. | 1st Apr 1936 | Box 130 \ 1 scan0377 | |
| Vehicle faults including noisy speedometer drive, engine start-up issues, and fan failure. | 17th Apr 1936 | Box 130 \ 1 scan0378 | |
| Faults and repairs for pedal mechanisms and thermometers. | 17th Apr 1936 | Box 130 \ 1 scan0379 | |
| Introducing a list of quarterly customer and repair department complaints for the 20/25 HP and Phantom II chassis. | 18th May 1936 | Box 130 \ 1 scan0380 | |
| Quarterly report from March 1936 detailing customer complaints about vehicle brakes. | 31th Mar 1936 | Box 130 \ 1 scan0381 | |
| Statistical report on brake failures over a six-month period, categorized by model and fault type. | 31th Mar 1936 | Box 130 \ 1 scan0382 | |
| Quarterly statistical report on vehicle complaints regarding brakes, servos, and clutches. | 31th Mar 1936 | Box 130 \ 1 scan0383 | |
| Quarterly summary report detailing vehicle component complaints and remarks on their performance. | 31th Mar 1936 | Box 130 \ 1 scan0384 | |
| Statistical report on various vehicle complaints and their remedies over a six-month period. | 31th Mar 1936 | Box 130 \ 1 scan0385 | |
| Quarterly report summarizing hydraulic system faults, including knocks, leaks, frame looseness, and control failures, with remarks on causes and fixes. | 31th Mar 1936 | Box 130 \ 1 scan0386 | |
| Statistical breakdown of vehicle complaints over two quarters, detailing issues and their remedies. | 31th Mar 1936 | Box 130 \ 1 scan0387 | |
| Vehicle failures over two quarters, broken down by issue and vehicle model. | 31th Mar 1936 | Box 130 \ 1 scan0388 | |
| Quarterly statistical report on vehicle failures for 25 HP and PH.II models, covering ignition, oil leaks, bonnet rattles, and lubrication. | 31th Mar 1936 | Box 130 \ 1 scan0389 | |
| Statistical summary of vehicle faults over a six-month period, categorized by issue and car model. | 31th Mar 1936 | Box 130 \ 1 scan0390 | |
| Statistical report on vehicle faults such as poor petrol consumption, exhaust rattle, and gearbox issues for the March quarter. | 18th May 1936 | Box 130 \ 1 scan0391 | |
| Quarterly complaints regarding rattling exhaust systems and suspension. | 18th May 1936 | Box 130 \ 1 scan0392 | |
| Quarterly complaints report concerning the 3½ Litre Bentley Chassis for the quarter ending March 1936. | 26th May 1936 | Box 130 \ 1 scan0393 | |
| Quarterly report analysing customer complaints regarding vehicle brakes for the March quarter of 1936. | 31th Mar 1936 | Box 130 \ 1 scan0394 | |
| Summary report of vehicle faults regarding servos and brakes, tallied over two quarters. | 31th Mar 1936 | Box 130 \ 1 scan0395 | |
| Summary report on brake faults including binding, front squeak, rear squeak, and handbrake squeak over a six-month period. | 31th Mar 1936 | Box 130 \ 1 scan0396 | |
| Summary report on vehicle faults and their remedies over a six-month period. | 31th Mar 1936 | Box 130 \ 1 scan0397 | |
| Vehicle faults over two quarters, with remarks on corrective actions and updated component standardisation. | 31th Mar 1936 | Box 130 \ 1 scan0398 | |
| Quarterly report detailing vehicle faults with handwritten annotations and queries. | 31th Mar 1936 | Box 130 \ 1 scan0399 | |
| Quarterly report summarizing vehicle faults, complaint counts, and remedial actions. | 31th Mar 1936 | Box 130 \ 1 scan0400 | |
| Quarterly report page detailing vehicle faults, their frequency, and remarks on causes and actions. | 31th Mar 1936 | Box 130 \ 1 scan0401 | |
| Faults over a six-month period, including water leaks, starter motors, engine gear rattle, and dynamos. | 31th Mar 1936 | Box 130 \ 1 scan0402 | |
| Summary report on vehicle issues including steering, pinking, and oil consumption. | 8th Oct 1935 | Box 130 \ 1 scan0403 | |
| Faults with second gear jumping and defective sparking plugs over a six-month period. | 8th Oct 1935 | Box 130 \ 1 scan0404 | |
| Cover note attaching a report on investigations into customer complaints at Cricklewood. | 4th Jul 1936 | Box 130 \ 2 scan0001 | |
| Typed memo listing and discussing various vehicle faults and complaints. | 30th Jun 1936 | Box 130 \ 2 scan0002 | |
| Vehicle performance issues including oil consumption, owner complaints, and brake squeaks. | 30th Jun 1936 | Box 130 \ 2 scan0003 | |
| Customer complaints for two cars, including oiled up plugs, poor running, and valve issues. | 30th Jun 1936 | Box 130 \ 2 scan0004 | |
| Owner's dissatisfaction with car steering issues. | 2nd Jul 1936 | Box 130 \ 2 scan0005 | |
| Confirming the dispatch of a set of H.T. Leads and four D/7142B-G Rotor Tops for a 25-HP vehicle. | 2nd Jul 1936 | Box 130 \ 2 scan0006 | |
| Outlining the objectives for a new investigation into quarterly customer complaints. | 3rd Jul 1936 | Box 130 \ 2 scan0007 | |
| Investigation report on a seized foot brake and other faults on vehicle GUL-19. | 1st Jul 1936 | Box 130 \ 2 scan0008 | |
| Faults concerning a spherical joint, Marles steering, exhaust suspension, and ignition wires. | 1st Jul 1936 | Box 130 \ 2 scan0009 | |
| Technical memorandum discussing issues with a Marles Steering roller follower and proposing a design change to prevent uneven loading. | 1st Jul 1936 | Box 130 \ 2 scan0010 | |
| Blueprint of an air silencer and connection pipe for a 30 HP car, detailing a known issue with the clip-on pipe distorting the carburettor. | 1st Jul 1936 | Box 130 \ 2 scan0011 | |
| Diagram highlighting leakage and uneven seating on a 30 HP oil filter assembly. | 1st Jul 1919 | Box 130 \ 2 scan0012 | |
| Blueprint detailing a rattling issue with the exhaust tail pipe mountings and the proposed solution. | 1st Jul 1919 | Box 130 \ 2 scan0013 | |
| Cross-section diagrams of a Marles steering mechanism with a roller follower. | 2nd Jul 1936 | Box 130 \ 2 scan0014 | |
| High tension wire sample from Helsby Cable Co. to solve insulation failure problems. | 2nd Jul 1936 | Box 130 \ 2 scan0015 | |
| Failure of four distributor rotors due to cracks in the bakelite. | 2nd Jul 1936 | Box 130 \ 2 scan0016 | |
| Suggestion to fix leaks in the 25/30 oil filler. | 2nd Jul 1936 | Box 130 \ 2 scan0017 | |
| Diagram showing a standard oil filler pipe and a suggested alteration for a 30 HP car. | 4th Jul 1936 | Box 130 \ 2 scan0018 | |
| Covering note for two reports by G.W.H. regarding investigations into customer complaints. | 4th Jul 1936 | Box 130 \ 2 scan0019 | |
| Resolving a noisy petrol pump, slow engine running, and silencer issues. | 3rd Jul 1936 | Box 130 \ 2 scan0020 | |
| Service issues and policies at the Bentley Depot, including clutch, axle, and cylinder reboring. | 3rd Jul 1936 | Box 130 \ 2 scan0021 | |
| Attaching two reports from G.W.H. regarding his investigations into customers' complaints at Cricklewood and Kingsbury. | 4th Jul 1936 | Box 130 \ 2 scan0022 | |
| Faults including a noisy petrol pump, slow running, and silencer spitting. | 3rd Jul 1936 | Box 130 \ 2 scan0023 | |
| Various mechanical issues and policies at the Bentley Depot, including clutch, axle, and cylinder wear. | 3rd Jul 1936 | Box 130 \ 2 scan0024 | |
| Customer complaints of steering issues and an oil leak on a 30 HP car, GUL-16. | 6th Jul 1936 | Box 130 \ 2 scan0025 | |
| Noisy dynamo coupling for a 4 1/4 litre Bentley, detailing issues with machining and component dimensions. | 6th Jul 1936 | Box 130 \ 2 scan0026 | |
| Blueprint showing a noisy dynamo coupling for a 4 1/2 Bentley. | 6th Jul 1936 | Box 130 \ 2 scan0027 | |
| Report responding to customer complaints about the 25/30HP model, discussing carburetor, engine, brake, and oil leak issues. | 6th Jul 1936 | Box 130 \ 2 scan0028 | |
| Water leaks from the Bentley water pump connection to the cylinder block, with a suggested cause and remedy. | 6th Jul 1936 | Box 130 \ 2 scan0029 | |
| Blueprint diagram showing the water pump connection to the cylinder block for a Bentley. | 6th Jul 1936 | Box 130 \ 2 scan0030 | |
| Spark plug misfiring issues when using Ethyl fuel in London traffic. | 7th Jul 1936 | Box 130 \ 2 scan0031 | |
| Cost comparison memo regarding the scrapping of a cylinder head versus a cylinder block, providing material and labour figures. | 7th Jul 1936 | Box 130 \ 2 scan0032 | |
| Dynamo failure on a Paris Bentley Trials car, B-60-GA, after 8,800 miles. | 9th Jul 1936 | Box 130 \ 2 scan0033 | |
| Blueprint diagram and fault analysis of a Bentley dynamo ventilator end. | 9th Jul 1936 | Box 130 \ 2 scan0034 | |
| From Levallois discussing faults with shock absorbers, a Bentley dynamo, and petrol pumps. | 9th Jul 1936 | Box 130 \ 2 scan0035 | |
| Faults relating to an armature, leaks from diaphragms, and faulty connections. | 9th Jul 1936 | Box 130 \ 2 scan0036 | |
| Response to a query regarding misfiring caused by Ethyl affecting sparking plugs, with a summary of recent complaints. | 9th Jul 1936 | Box 130 \ 2 scan0037 | |
| Exhaust suspension rattles and clearances on 20/25 & 25/30 HP models. | 10th Jul 1936 | Box 130 \ 2 scan0038 | |
| Unsuccessful test on a 20/25 model to resolve a silencer spitting issue by removing the front expansion box. | 10th Jul 1936 | Box 130 \ 2 scan0039 | |
| Vehicle testing, part modifications, and logistics for specific cars. | 11th Jul 1936 | Box 130 \ 2 scan0040 | |
| Complaints of rear damper knocks across various models and their potential causes. | 11th Jul 1936 | Box 130 \ 2 scan0041 | |
| Letter detailing a simple modification to fix noisy petrol pumps. | 11th Jul 1936 | Box 130 \ 2 scan0042 | |
| Blueprint diagram illustrating a fault with a loose diaphragm causing a petrol leak. | 11th Jul 1936 | Box 130 \ 2 scan0043 | |
| Blueprint diagram illustrating a modification to a pump blade to reduce noise. | 13th Jul 1936 | Box 130 \ 2 scan0044 | |
| Recurrence of shock absorber noises, attributing them to increased bearing clearances from the factory. | 13th Jul 1936 | Box 130 \ 2 scan0045 | |
| Customer complaints regarding high oil consumption and clutch issues in certain car models. | 13th Jul 1936 | Box 130 \ 2 scan0046 | |
| Brief typed response to a query regarding sparking plugs. | 13th Jul 1936 | Box 130 \ 2 scan0047 | |
| Petrol tank unit suspected to have been damaged by an abrasive chemical. | 13th Jul 1936 | Box 130 \ 2 scan0048 | |
| Rattles and clearances in the exhaust tail pipe suspension. | 13th Jul 1936 | Box 130 \ 2 scan0049 | |
| Customer complaints regarding exhaust suspension, cylinder heads, and overoiling on various car models. | 13th Jul 1936 | Box 130 \ 2 scan0050 | |
| Querying if Depots can plug the cylinder head instead of the cylinders to prevent damage to new cars. | 14th Jul 1936 | Box 130 \ 2 scan0051 | |
| Fault with the Ignition Warning Light on 25 & 30 HP cars, causing the dynamo not to charge. | 14th Jul 1936 | Box 130 \ 2 scan0052 | |
| Typed telegram regarding the readiness of car B-56-BN and recommending a trip to Derby. | 15th Jul 1936 | Box 130 \ 2 scan0053 | |
| Note on removing pads from shock damper pistons and issues with incorrect heat treatment. | 15th Jul 1936 | Box 130 \ 2 scan0054 | |
| The issue of oil on the front brakes, with reference to an attached sketch. | 17th Jul 1936 | Box 130 \ 2 scan0055 | |
| Oil leaking onto the front brakes of the 20/25 model and proposed solutions. | 6th Jul 1936 | Box 130 \ 2 scan0056 | |
| Blueprint detailing an issue with oil on the front brakes of a 20/25 HP car and proposed modifications. | 6th Jul 1936 | Box 130 \ 2 scan0057 | |
| Oil leaks from the Marles Steering Box. | 17th Jul 1936 | Box 130 \ 2 scan0058 | |
| Fix for an oil leak in a Marles steering box by moving the Patent No. Plate. | 8th Jul 1936 | Box 130 \ 2 scan0059 | |
| Blueprint suggesting a new position for a patent plate on a Marles Steering component to prevent oil leakage. | 8th Jul 1936 | Box 130 \ 2 scan0060 | |
| Cover memo attaching four reports from Cricklewood regarding investigated complaints. | 17th Jul 1936 | Box 130 \ 2 scan0061 | |
| Recent car failures including noisy pumps, stalling, and carburetor issues. | 1st Jul 1936 | Box 130 \ 2 scan0062 | |
| 30 HP car, GUL-20, with a sticking oil relief valve due to bad fitting and burrs. | 7th Jul 1936 | Box 130 \ 2 scan0063 | |
| Poor quality and faults found in a Marles steering column from a GUL-16 car, including an oil leak and rough component finishing. | 7th Jul 1936 | Box 130 \ 2 scan0064 | |
| Steering wander issues in a GUL-16 car fitted with a new Marles's steering column and box. | 9th Jul 1936 | Box 130 \ 2 scan0065 | |
| Telegram about vehicle B-56-BN, enclosing complaint reports, and detailing clutch resolutions. | 15th Jul 1936 | Box 130 \ 2 scan0066 | |
| Report from the Customers' Complaints Dept. detailing repairs to Bentley front axle controls and recommending a re-design. | 19th Jun 1936 | Box 130 \ 2 scan0067 | |
| Phantom III trial car's dangerous braking behaviour and a query about valve springs. | 19th Jun 1936 | Box 130 \ 2 scan0068 | |
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