| Description | Date | Identifier | |
| Performance and design of synchromesh units in gearboxes. | 18th Aug 1938 | Box 148 \ 5 scan0418 | |
| Potential crankcase and sump modifications for the Wraith model. | 22th Aug 1938 | Box 148 \ 5 scan0419 | |
| Specification memo detailing the build status and component requirements for a new type of car. | 24th Aug 1938 | Box 148 \ 5 scan0420 | |
| List of part reference numbers and status for various vehicle systems. | 24th Aug 1938 | Box 148 \ 5 scan0421 | |
| Parts specifications and availability for vehicle systems. | 24th Aug 1938 | Box 148 \ 5 scan0422 | |
| Quotation comparison for 4.5' x 16' disc wheels from firms Dunlop and Sankey. | 24th Aug 1938 | Box 148 \ 5 scan0423 | |
| Viability and cost of die-casting gearbox dipsticks in aluminium versus steel for various car models. | 26th Aug 1938 | Box 148 \ 5 scan0424 | |
| Offer from Hoyt Metal Company to supply main bearings for Wraith engines. | 27th Aug 1938 | Box 148 \ 5 scan0425 | |
| Production schedule and proposed modifications for the Phantom III 'E' Series chassis. | 27th Aug 1938 | Box 148 \ 5 scan0426 | |
| Cost and reasons for experimental scrap parts due to design changes and incorrect drawings. | 29th Aug 1938 | Box 148 \ 5 scan0427 | |
| List of required design alterations for various components of the Wraith chassis. | 9th Sep 1938 | Box 148 \ 5 scan0428 | |
| List of design change suggestions and status updates for various vehicle components. | 6th Sep 1938 | Box 148 \ 5 scan0429 | |
| Investigation into proposed modifications to the Wraith cylinder block to facilitate casting and reduce factory costs. | 7th Sep 1938 | Box 148 \ 5 scan0430 | |
| The procurement policy for bought-out chassis and fabricated parts, emphasizing the need for competitive quotations. | 8th Sep 1938 | Box 148 \ 5 scan0431 | |
| Sub-contract die work for models B.III and B.50, addressing process inefficiencies. | 10th Sep 1938 | Box 148 \ 5 scan0432 | |
| Cost analysis of a Jaguar car, comparing its chassis to the B.50 chassis to investigate potential cost reductions. | 15th Sep 1938 | Box 148 \ 5 scan0433 | |
| Comparison of engine and chassis design, materials, and manufacturing costs against a competitor's model. | 15th Sep 1938 | Box 148 \ 5 scan0434 | |
| Analysis of the Jaguar production programme, comparing manufacturing costs, body, and weight. | 15th Sep 1938 | Box 148 \ 5 scan0435 | |
| Comparison of Jaguar and Bentley cars, covering the exhaust system, frame, engine design, and performance tests. | 15th Sep 1938 | Box 148 \ 5 scan0436 | |
| Summary page recommending a study into a car's body construction relative to its cost. | 15th Sep 1938 | Box 148 \ 5 scan0437 | |
| Weight comparison of components between a Jaguar and a 4¼-Litre Bentley, detailing the advantages of the heavier parts. | 22th Sep 1938 | Box 148 \ 5 scan0438 | |
| Discontinuation of polishing on Wraith III push rods to save costs. | 22th Sep 1938 | Box 148 \ 5 scan0439 | |
| Cost and weight comparison between the Wraith and Leyland Cub gearboxes. | 16th Sep 1938 | Box 148 \ 5 scan0440 | |
| Outlining the car programme, detailing major units and the work required to complete various projects. | 16th Sep 1938 | Box 148 \ 5 scan0441 | |
| Announcing the cessation of all design and experimental work on F.III. | 30th Sep 1928 | Box 148 \ 5 scan0442 | |
| Clarifying the specifications for a Silver Wraith 30.G.VII, including engine and parts details. | 3rd Oct 1938 | Box 148 \ 5 scan0443 | |
| 10% surplus allowance on chassis materials for the Wraith 'G' Series to cover scrap and shortages. | 3rd Oct 1938 | Box 148 \ 5 scan0444 | |
| Cover note explaining why a memo on bought-out fabricated parts is not being circulated. | 5th Oct 1938 | Box 148 \ 5 scan0445 | |
| Strategy and challenges of procuring fabricated parts from external suppliers. | 23th Sep 1938 | Box 148 \ 5 scan0446 | |
| Justification for a new purchasing scheme, citing a 20% reduction in material costs on the Bentley 30 compared to the Wraith. | 23th Sep 1938 | Box 148 \ 5 scan0447 | |
| Delivery union failure in S.U. Petrol Pumps due to a deep counterboring operation. | 5th Jan 1934 | Box 149 \ 1 scan0001 | |
| Faulty S.U. petrol pumps caused by incorrect drawing dimensions. | 9th Jan 1934 | Box 149 \ 1 scan0002 | |
| Logistics of changing unions on S.U. petrol pumps, proposing a batch exchange system. | 9th Jan 1934 | Box 149 \ 1 scan0003 | |
| The decision to change over complete S.U. petrol pumps and organising the supply and work orders. | 10th Jan 1934 | Box 149 \ 1 scan0004 | |
| Issues and resolutions regarding S.U. Petrol Pumps for Bentley Chassis due to incorrectly designed Unions. | 13th Jan 1934 | Box 149 \ 1 scan0005 | |
| Requesting the expedited assembly and testing of a petrol pump, EX.13301, for the Vulture project. | 31th Jan 1934 | Box 149 \ 1 scan0006 | |
| Cover note forwarding a letter from Central Garage, Ltd., regarding trouble with Bentley petrol lifts. | 21th Feb 1934 | Box 149 \ 1 scan0007 | |
| Letter from Central Garage Ltd. to Bentley Motors about a petrol lift fault on a 3 1/2 litre Trials car. | 20th Feb 1934 | Box 149 \ 1 scan0008 | |
| Issue with loose Bakelite retaining nuts on Bentley petrol pumps. | 22th Feb 1934 | Box 149 \ 1 scan0009 | |
| Complaint regarding loose wire retaining nuts on a Bentley petrol pump. | 22th Feb 1934 | Box 149 \ 1 scan0010 | |
| Issue with Bentley petrol pumps caused by loose retaining nuts and the follow-up actions. | 23th Feb 1934 | Box 149 \ 1 scan0011 | |
| Complaint about loose external electrical connections on Bentley petrol pumps. | 22th Feb 1934 | Box 149 \ 1 scan0012 | |
| Request to wire a car for the standard type petrol pump. | 2nd Mar 1934 | Box 149 \ 1 scan0013 | |
| Request for analysis of a corrosion sample taken from an S.U. Petrol Pump that caused it to fail. | 13th Mar 1934 | Box 149 \ 1 scan0014 | |
| The anti-corrosion treatment for petrol pump castings and filter bowls. | 21th Mar 1934 | Box 149 \ 1 scan0015 | |
| Letter from The S.U. Company regarding a request for a pump with a larger output. | 23th Mar 1934 | Box 149 \ 1 scan0016 | |
| Continuation of a letter from THE S.U. COMPANY regarding pump design and potential improvements. | 24th Apr 1934 | Box 149 \ 1 scan0017 | |
| Letter to S.U. Carburetter Co. discussing fuel pump performance requirements for a Bentley engine. | 24th Apr 1934 | Box 149 \ 1 scan0018 | |
| Letter from The S.U. Company regarding the output of a double unit to 150 pints per hour. | 25th Apr 1934 | Box 149 \ 1 scan0019 | |
| Letter to The S.U. Co. Ltd. regarding issues with buckled petrol pump valves and a request for replacements. | 1st May 1934 | Box 149 \ 1 scan0020 | |
| Request to fit standard petrol pumps, pipes and wiring to two cars to bring them up-to-date. | 3rd May 1934 | Box 149 \ 1 scan0021 | |
| Letter from The S.U. Company regarding enclosed valves and pump types. | 4th May 1934 | Box 149 \ 1 scan0022 | |
| Letter to The S.U. Company regarding sticking petrol pumps and returning faulty components for comment. | 12th May 1934 | Box 149 \ 1 scan0023 | |
| Covering memo for a document about Bentley Petrol Pumps to be circulated to Depots. | 14th May 1934 | Box 149 \ 1 scan0024 | |
| Troubleshooting and maintenance instructions for Bentley Petrol Pumps. | 14th May 1934 | Box 149 \ 1 scan0025 | |
| Instructions for setting a diaphragm and re-fitting a pump, page 2. | 14th May 1934 | Box 149 \ 1 scan0026 | |
| Issues with petrol feed systems, including vapor lock, and proposals for improvements on Bentley and Spectre models. | 17th May 1934 | Box 149 \ 1 scan0027 | |
| Petrol level indicators and the sourcing of an S.U.Co. electric petrol pump for the Spectre project. | 17th May 1934 | Box 149 \ 1 scan0028 | |
| Alternative petrol feed reserve systems for Bentley cars, mentioning model 10-EX. | 24th May 1934 | Box 149 \ 1 scan0029 | |
| Instruction to fit a new petrol pump and apply a scheme to the float chamber. | 6th Jun 1934 | Box 149 \ 1 scan0030 | |
| Modified pump from the S.U. Company, including a copy of their letter. | 27th Jun 1934 | Box 149 \ 1 scan0031 | |
| Delivery of a pair of pressure pumps from S.U. Company Ltd. for the Experimental Department. | 28th Jun 1934 | Box 149 \ 1 scan0032 | |
| Requesting an official order for a pair of larger capacity pressure pumps from S.U. Co. for testing. | 29th Jun 1934 | Box 149 \ 1 scan0033 | |
| Correspondence with S. Smith & Sons regarding a 'Jackall' Compressor Pump and Jacks, including blueprints for a Bentley chassis. | 29th Jun 1934 | Box 149 \ 1 scan0034 | |
| Letter to The S.U. Co. Ltd. regarding the testing of a large capacity fuel pump. | 5th Jul 1934 | Box 149 \ 1 scan0035 | |
| Request to manufacture one bracket to carry an S.U. Fuel Pump on the steering column of 19-G-IV. | 10th Jul 1934 | Box 149 \ 1 scan0036 | |
| Letter from The S.U. Company regarding the discovery of incorrect steel supplied for petrol pump coils. | 9th Jul 1934 | Box 149 \ 1 scan0037 | |
| Continuation page of a letter from The S.U. Company regarding a regrettable occurrence. | 14th Jul 1934 | Box 149 \ 1 scan0038 | |
| Letter to a supplier regarding faulty cores in Bentley petrol pumps and requesting replacements. | 14th Jul 1934 | Box 149 \ 1 scan0039 | |
| Request for fuel pumps and carburettors for E.R. Hall's car participating in the Ulster T.T. race. | 14th Jul 1934 | Box 149 \ 1 scan0040 | |
| Official order be issued to the S.U. Co. for standard petrol pumps and Bentley carburetters. | 14th Jul 1934 | Box 149 \ 1 scan0041 | |
| Letter from The S.U. Company regarding issues with batches of incorrect pump core material and subsequent redesigns. | 16th Jul 1934 | Box 149 \ 1 scan0042 | |
| Letter from The S.U. Company suggesting a temporary replacement plan for suspect pumps. | 17th Jul 1934 | Box 149 \ 1 scan0043 | |
| Letter to T.C. Skinner of The S.U. Co. Ltd. regarding the inspection and replacement of pumps. | 17th Jul 1934 | Box 149 \ 1 scan0044 | |
| Faulty Bentley petrol pumps due to incorrect material and the arrangements for their replacement. | 18th Jul 1934 | Box 149 \ 1 scan0045 | |
| Letter from The S.U. Company regarding an investigation into pumps with faulty cores and diaphragms. | 20th Jul 1934 | Box 149 \ 1 scan0046 | |
| Letter to The S.U. Company regarding issues with petrol pumps and carburetter parts. | 23th Jul 1934 | Box 149 \ 1 scan0047 | |
| Letter from The S.U. Company regarding the rectification of pumps and cleaning of banjo joints. | 24th Jul 1934 | Box 149 \ 1 scan0048 | |
| Letter to S.U. Carburetter Co. Ltd. requesting a stamping mark on Bentley Petrol Pumps. | 28th Jul 1934 | Box 149 \ 1 scan0049 | |
| Letter from The S.U. Company regarding the marking of Bentley Petrol Pumps. | 30th Jul 1934 | Box 149 \ 1 scan0050 | |
| Large quantity of defective S.U. petrol pumps that require a changeover. | 31th Jul 1934 | Box 149 \ 1 scan0051 | |
| Letter to The S.U. Co. Ltd. regarding the stamping procedure for Bentley Petrol Pumps. | 31th Jul 1934 | Box 149 \ 1 scan0052 | |
| Letter concerning the specifications of pumps stamped with an 'H', confirming they are up-to-date and not fitted with split diaphragms. | 1st Aug 1934 | Box 149 \ 1 scan0053 | |
| Identification stamping of Bentley petrol pumps and a list of chassis requiring it. | 2nd Aug 1934 | Box 149 \ 1 scan0054 | |
| Letter to The S.U. Carburetter Co. Ltd. regarding the completion of a new type of petrol pump casting. | 7th Aug 1934 | Box 149 \ 1 scan0055 | |
| Delay in Bentley output due to a shortage of petrol pumps from the S.U. Co. | 29th Aug 1934 | Box 149 \ 1 scan0056 | |
| Letter to The S.U. Co. Ltd. regarding noisy Bentley petrol pumps and sending units for comparison. | 4th Sep 1934 | Box 149 \ 1 scan0057 | |
| Letter from O.D. Cars Ltd. regarding the replacement of a fuel pump on a Bentley and the return of the defective part. | 4th Sep 1934 | Box 149 \ 1 scan0058 | |
| Letter from The S.U. Company regarding the investigation and supply of Bentley Petrol Pumps and carburetters. | 5th Sep 1934 | Box 149 \ 1 scan0059 | |
| Letter to O.D. Cars Ltd. regarding a pump replacement for the King of Siam's car and a mix-up with a parts catalogue request. | 7th Sep 1934 | Box 149 \ 1 scan0060 | |
| Letter to The S.U. Company regarding the urgent modification of 3 pumps and inspection of cracked base plugs. | 10th Sep 1934 | Box 149 \ 1 scan0061 | |
| Letter to The S.U. Company regarding the poor condition of rectified pumps and requesting they be refinished. | 10th Sep 1934 | Box 149 \ 1 scan0062 | |
| Letter to The S.U. Company Ltd. regarding the testing of new fuel pump diaphragms with different fuels. | 12th Oct 1934 | Box 149 \ 1 scan0063 | |
| Letter to S.U. Co. Limited regarding the testing of diaphragms and issues with Bentley float parts. | 17th Oct 1934 | Box 149 \ 1 scan0064 | |
| Letter regarding the fitting of large capacity pumps to a Bentley, modifications to piping, and a request for drawings. | 17th Oct 1934 | Box 149 \ 1 scan0065 | |
| Letter to The S.U. Co. Ltd. regarding an epidemic of flooding carburettors and noisy fuel pumps. | 19th Oct 1934 | Box 149 \ 1 scan0066 | |
| Request for advance notice of any planned modifications to pumps or carburetters. | 19th Oct 1934 | Box 149 \ 1 scan0067 | |
| Preliminary blueprint for mounting an S.U. petrol pump and filter. | 19th Oct 1934 | Box 149 \ 1 scan0068 | |
| Potential change to S.U. Electric Petrol Pumps for the 20/25 model. | 22th Oct 1934 | Box 149 \ 1 scan0069 | |
| Request for a drawing or print of the Jackall pump box to generally understand the system. | 29th Oct 1934 | Box 149 \ 1 scan0070 | |
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