| Description | Date | Identifier | |
| Assessment of the cost and production readiness for extra jigs, tools, and equipment for the 'G' series chassis. | 17th Sep 1935 | Box 168 \ 1 img230 | |
| The fitting of new H.T. ignition cables to production chassis and the associated problems and proposed solutions. | 19th Nov 1935 | Box 168 \ 1 img231 | |
| Dimensional specifications for H.T. ignition cables for production chassis. | 18th Nov 1935 | Box 168 \ 1 img232 | |
| Sizing of ignition wire tubes for large bore Bentley and 25/29 HP models. | 19th Nov 1935 | Box 168 \ 1 img233 | |
| Adjustment of conductor sizes for wiring on various car chassis to use smaller conduits. | 27th Nov 1935 | Box 168 \ 1 img234 | |
| Comparison of specification and road test results for various H.T. chassis cables. | 9th Nov 1935 | Box 168 \ 1 img235 | |
| List of electrical circuits and their corresponding cable sizes for all chassis types, with handwritten amendments. | 27th Nov 1935 | Box 168 \ 1 img236 | |
| Replying to a proposal with recommendations for wiring cables. | 29th Nov 1935 | Box 168 \ 1 img237 | |
| List of electrical circuits and their respective cable sizes for all chassis. | 27th Nov 1935 | Box 168 \ 1 img238 | |
| Conductor wiring sizes for various chassis components, including switches, gauges, and lamps. | 2nd Dec 1935 | Box 168 \ 1 img239 | |
| Ignition wiring and vertical trunk tubes for the Phantom III. | 3rd Dec 1935 | Box 168 \ 1 img240 | |
| Invoice from Henry Wiggin & Co. Ltd. for Brightray Wire, requesting payment authorization. | 9th Dec 1935 | Box 168 \ 1 img241 | |
| Request to place an order for two different gauges of brightray wire from Messrs. Henry Wiggin & Co. Ltd. | 10th Dec 1935 | Box 168 \ 1 img242 | |
| New wiring and fittings features and a list of cable prints for the 25/30 HP Chassis. | 16th Dec 1935 | Box 168 \ 1 img243 | |
| Request to obtain a sample of a new screened H.T. cable from Ward & Goldstone, Ltd. | 28th Jan 1936 | Box 168 \ 1 img244 | |
| New drawings and existing parts for Phantom III chassis wire fittings. | 29th Jan 1936 | Box 168 \ 1 img245 | |
| Internal request to order 'Superfine' copper wire from Messrs. Concordia Ltd. | 30th Jan 1936 | Box 168 \ 1 img246 | |
| Standardisation of H.T. Ignition Cable to R.R. Specification No. 271. | 11th Nov 1935 | Box 168 \ 1 img247 | |
| Cost estimate note regarding the production of the 'L' series chassis. | 6th Feb 1936 | Box 168 \ 1 img249 | |
| Letter from British Insulated Cables Ltd. regarding a sample of Black Systoflex Sleeving. | 6th Feb 1936 | Box 168 \ 1 img250 | |
| Letter regarding the decision to charge for specially manufactured Thiokol Protected Ignition Cable. | 11th Feb 1936 | Box 168 \ 1 img251 | |
| Order for one pound of 24 S.W.G. Glowray wire. | 18th Feb 1936 | Box 168 \ 1 img252 | |
| Requesting a covering order for samples from British Insulated Cables Ltd. | 18th Feb 1936 | Box 168 \ 1 img253 | |
| List of special wiring parts required for the Phantom III Long Wheelbase Chassis. | 21th Feb 1936 | Box 168 \ 1 img254 | |
| Letter to a supplier regarding specifications for a sample sheath and sleeving. | 27th Jan 1936 | Box 168 \ 1 img255 | |
| Order for two types of copper wire from Messrs. Cancordia Ltd. | 4th Mar 1936 | Box 168 \ 1 img256 | |
| Requesting a suitable fuse box for the electrical wiring of a ramp test rig, specifying a type used on the Phantom II chassis. | 29th Apr 1936 | Box 168 \ 1 img257 | |
| The need to modify the wiring on chassis GAE-20 to suit a new dynamo. | 4th May 1936 | Box 168 \ 1 img258 | |
| Request to order tinned-copper fuse wire for the Electrical Laboratory. | 24th Jun 1936 | Box 168 \ 1 img259 | |
| The failure of plug leads in a 22 G.V. model, detailing causes and temporary solutions. | 26th Jun 1936 | Box 168 \ 1 img260 | |
| Sample of high tension wire intended to overcome insulation failure. | 2nd Jul 1936 | Box 168 \ 1 img261 | |
| Urgent modification to the Bentley & 25/30 High Tension Ignition Rotor die to address on-road failures. | 6th Jul 1936 | Box 168 \ 1 img262 | |
| Road test for Professor Dodds' Bentley, detailing misfiring and clutch issues. | 29th Jul 1936 | Box 168 \ 1 img263 | |
| Customer complaints caused by faulty ignition cables and a recommendation to use a previously developed improved cable. | 29th Jul 1936 | Box 168 \ 1 img264 | |
| Letter from The Concordia Electric Wire Co. Ltd. confirming the dispatch of a reel of 44 swg Enamelled Copper Wire. | 31th Jul 1936 | Box 168 \ 1 img265 | |
| Issues with new, larger diameter high-tension ignition cables not fitting standard conduits and the decision to introduce them with larger conduits. | 31th Jul 1936 | Box 168 \ 1 img266 | |
| Despatch request for a sample piece of brass tubing with thermo couple wire to Concordia Electric Wire Co. Ltd. | 1st Aug 1936 | Box 168 \ 1 img267 | |
| The specification change for chassis ignition cables from maconite to Helsby rubber. | 3rd Aug 1936 | Box 168 \ 1 img268 | |
| Request for the manufacture of four Bentley ignition governor springs for an E.R. Hall's T.T. Bentley Engine. | 11th Aug 1936 | Box 168 \ 1 img269 | |
| Road testing of a new ozone-proof H.T. wire set manufactured by Messrs. Johnson and Phillips. | 15th Aug 1936 | Box 168 \ 1 img270 | |
| Request to despatch a set of H.T. ignition cables and steel conduit for Bentley chassis 6-B-1V. | 15th Aug 1936 | Box 168 \ 1 img271 | |
| Requesting the despatch of ignition cables to France for a 10,000-mile trial on chassis 6-B-SV. | 17th Aug 1936 | Box 168 \ 1 img272 | |
| Changeover to Helsby high tension wires and the instruction to scrap existing stocks of maconite cable. | 17th Sep 1936 | Box 168 \ 1 img273 | |
| Continued use of faulty Maconinte high tension wire despite issues in service. | 15th Sep 1936 | Box 168 \ 1 img274 | |
| Complaints of the propeller shaft fouling the battery cable conduit on a Phantom III chassis. | 27th Nov 1936 | Box 168 \ 1 img275 | |
| Internal request to place an order for enamelled single paper covered copper wire from Messrs. Concordia. | 18th Sep 1936 | Box 168 \ 1 img276 | |
| Request to fit Johnson & Philips H.T. Cable to specific Phantom III and Bentley chassis. | 14th Oct 1936 | Box 168 \ 1 img277 | |
| Complaint that a wiring conduit on the Phantom III chassis is fouling the propeller shaft. | 27th Nov 1936 | Box 168 \ 1 img278 | |
| List of required cables for the revised position of the junction box on a Phantom III. | 1st Jan 1937 | Box 168 \ 1 img279 | |
| The issuance of blueprints and parts for the Wraith II frame wiring and fittings. | 8th Jan 1937 | Box 168 \ 1 img280 | |
| First failure of a Helsby Cable taken from chassis GGM-31 after 750 miles. | 26th Jan 1937 | Box 168 \ 1 img281 | |
| Letter to a cable supplier regarding a high-tension cable failure on a Phantom III chassis. | 1st Feb 1937 | Box 168 \ 1 img282 | |
| Letter from the Royal Aircraft Establishment concerning coil ignition units, requesting loan parts and specific technical details. | 20th Mar 1937 | Box 168 \ 1 img283 | |
| Letter from the Royal Aircraft Establishment concerning the testing of coil ignition units. | 20th Mar 1937 | Box 168 \ 1 img284 | |
| Letter from the Air Ministry regarding coil ignition units and screening for engine development sets. | 29th Mar 1937 | Box 168 \ 1 img285 | |
| Letter to the Royal Aircraft Establishment regarding coil ignition specifications, gear ratios, and component delivery. | 25th Mar 1937 | Box 168 \ 1 img286 | |
| Letter to the Air Ministry concerning the supply of Coil Ignition Units and related parts. | 31th Mar 1937 | Box 168 \ 1 img287 | |
| Letter from the Royal Aircraft Establishment regarding coil ignition screens for interference testing on Kestrel and Hart aircraft. | 1st Apr 1937 | Box 168 \ 1 img288 | |
| Complaint regarding faulty Helsby ignition cable with perished and cracked rubber insulation. | 2nd Apr 1937 | Box 168 \ 1 img289 | |
| The poor quality of Helsby High Tension Ignition Cable and testing of new samples. | 5th Apr 1937 | Box 168 \ 1 img290 | |
| Letter to the Royal Aircraft Establishment regarding the delivery of a system for testing. | 5th Apr 1937 | Box 168 \ 1 img291 | |
| Concluding that enamelled single paper-covered wire is a false economy and should be discontinued. | 12th Apr 1937 | Box 168 \ 1 img292 | |
| Change in conductor manufacturing standards as advised by the Cable Makers Association. | 19th Apr 1937 | Box 168 \ 1 img293 | |
| Agreeing to the introduction of improved cables for chassis wiring, replacing the pure rubber type. | 20th Apr 1937 | Box 168 \ 1 img294 | |
| The Body Lighting and Headlamp Junction Box for the Wraith III Chassis. | 28th Apr 1937 | Box 168 \ 1 img295 | |
| Breakdown call-out for a 25/30 car, identifying the fault as a broken low tension lead to the coil. | 14th Jun 1937 | Box 168 \ 1 img296 | |
| Modifications for pipes and wiring on the Wraith III chassis regarding conduits and pipe runs. | 3rd Nov 1937 | Box 168 \ 1 img297 | |
| Scheme document detailing the pipes and wiring conduits for the Wraith III. | 1st Dec 1937 | Box 168 \ 1 img298 | |
| Record of the pictorial layout for Bentley 111 wiring. | 11th Jan 1938 | Box 168 \ 1 img299 | |
| Pipes and wiring conduits scheme F.CD.112 for the Wraith III model. | 14th Jan 1938 | Box 168 \ 1 img300 | |
| Wiring modification for the Wraith III model. | 29th Jan 1938 | Box 168 \ 1 img301 | |
| Parts for wiring and fittings for the Wraith 6 Sets. | 10th Feb 1938 | Box 168 \ 1 img302 | |
| List of parts and assembly instructions for wiring and fittings, which replaces previous Lists of Parts (LOPs). | 10th Feb 1938 | Box 168 \ 1 img303 | |
| Dispatch of blueprints for Bentley 50 wiring layout and harness. | 8th Apr 1938 | Box 168 \ 1 img304 | |
| Blueprints and parts for the Bentley 50 Wiring and Fittings. | 8th Apr 1938 | Box 168 \ 1 img305 | |
| Instructions for ordering various specified electrical cables from Messrs. Lucas. | 10th Jun 1938 | Box 168 \ 1 img306 | |
| Proposing a new wiring scheme for the Wraith reverse light switch. | 10th Jun 1938 | Box 168 \ 1 img307 | |
| Failure in the low tension ignition wiring on the Wraith model due to engine movement. | 20th Jun 1938 | Box 168 \ 1 img308 | |
| Wiring harnesses from Ripaults Ltd. for testing on Bentley and Wraith experimental cars. | 7th Oct 1938 | Box 168 \ 1 img309 | |
| Proposal for extending the wiring harness from the dash to the rear of the instrument board to create a tidier job. | 4th Nov 1938 | Box 168 \ 1 img310 | |
| Letter to Joseph Lucas Ltd. regarding car tests and the resistance ratio of a regulator. | 25th Nov 1938 | Box 168 \ 1 img311 | |
| Letter discussing battery charging rate adjustments, locating lost units, and the return of a borrowed regulator unit. | 25th Nov 1938 | Box 168 \ 1 img312 | |
| Test observations on a Bentley car fitted with a Lucas electrical harness, measuring voltage and current. | 30th Nov 1938 | Box 168 \ 1 img313 | |
| Request to fit a new cable between the coil and ballast resistance for chassis B.56.BN due to a broken terminal. | 30th Nov 1938 | Box 168 \ 1 img314 | |
| Requesting a mock-up for car wiring and electrical equipment due to unclear instructions and a change from wiring harnesses to conduits. | 6th Jan 1939 | Box 168 \ 1 img315 | |
| Modification details for the footswitch and wiring on B.5, B.50, and Wraith 80 models. | 9th Jan 1939 | Box 168 \ 1 img316 | |
| Specifying changes to the dash and footswitch wiring, cancelling a previous design. | 24th Jan 1939 | Box 168 \ 1 img317 | |
| Parts list for the Bentley V dashboard and footswitch wiring scheme. | 3rd Feb 1939 | Box 168 \ 1 img318 | |
| Parts list for securing tubes to the frame and dash, including ferrules, clips, and fixings. | 3rd Feb 1939 | Box 168 \ 1 img319 | |
| Wiring scheme for the Bentley 5 dashboard, specifically the engine side, and plans for a bench mock-up. | 4th Mar 1939 | Box 168 \ 1 img320 | |
| Requesting parts for a dashboard wiring mock-up for the Bentley V Chassis, listing required blueprints. | 15th Mar 1939 | Box 168 \ 1 img321 | |
| Blueprints for alterations to the regulator and distribution board for the Bentley V Chassis dashboard wiring mock-up. | 21th Mar 1939 | Box 168 \ 1 img322 | |
| Requesting an update to the obsolete dashboard wiring on car 2.B.50. | 4th May 1939 | Box 168 \ 1 img323 | |
| Cover letter from General Electric Co. Ltd. for a price booklet on automobile cables. | 8th May 1939 | Box 168 \ 1 img324 | |
| Blueprints for dash wiring components for the Bentley V, also noted as suitable for the Silver Wraith. | 5th May 1939 | Box 168 \ 1 img325 | |
| Parts and blueprints for the dash wiring of a Bentley V. | 31th May 1939 | Box 168 \ 1 img326 | |
| Providing blueprints for a starter cable conduit for the Bentley V & Silver Ripple models. | 10th Jul 1939 | Box 168 \ 1 img327 | |
| Scheme for ignition wiring on high power engines. | 2nd Aug 1939 | Box 168 \ 1 img328 | |
| Weight of electrical equipment, specifically headlamps and wiring. | 24th Aug 1939 | Box 168 \ 1 img329 | |
| Letter from Joseph Lucas Limited regarding samples of Roko Tubing and Empire Tubing. | 6th Jan 1940 | Box 168 \ 1 img330 | |
| | | | |
