| Description | Date | Identifier | |
| Requesting a monthly report on the development and modification of the 'Six Worst Features'. | 18th Oct 1926 | Box 47 \ 1 Scan354 | |
| Improvements to the 'worst features' of the 20 HP and Phantom models. | 20th Oct 1926 | Box 47 \ 1 Scan355 | |
| Various vehicle faults and the status of their respective remedies. | 25th Oct 1926 | Box 47 \ 1 Scan356 | |
| Overoiling issue on chassis 115-MC and disputing micrometer measurements. | 25th Oct 1926 | Box 47 \ 1 Scan357 | |
| Oil leakage in engine bearings and a method for testing clearance. | 25th Oct 1926 | Box 47 \ 1 Scan358 | |
| Quarterly report listing the 12 worst customer complaints for the 40/50HP Phantom model. | 29th Oct 1926 | Box 47 \ 1 Scan359 | |
| Note about future inclusions for the quarterly returns, specifically N. and P. returns and outdoor work. | 29th Oct 1926 | Box 47 \ 1 Scan360 | |
| Quarterly report listing the 12 worst customer complaints for the 40/50HP Phantom model. | 29th Oct 1926 | Box 47 \ 1 Scan361 | |
| Quarterly returns and future work, with a large section of mirrored text detailing project statuses. | 1st Sep 1938 | Box 47 \ 1 Scan362 | |
| Arranging to test drive chassis no. 44-EU for Frank Fisher Esq upon its arrival at the Works. | 3rd Nov 1926 | Box 47 \ 1 Scan363 | |
| To Frank Fisher concerning the inspection and potential improvement of the rear seat springing and cushion on chassis No.44-EU. | 1st Nov 1926 | Box 47 \ 1 Scan364 | |
| Customer complaint regarding unsatisfactory springing on a Silver Ghost, chassis 44-EU. | 1st Nov 1926 | Box 47 \ 1 Scan365 | |
| Requesting Mr. Gibb's initials to investigate a complaint of blow-back in the carburetter. | 2nd Nov 1926 | Box 47 \ 1 Scan366 | |
| Response to M. Poberejsky regarding chassis II5 MC, discussing incorrect micrometers and bearing test methods. | 3rd Feb 1926 | Box 47 \ 1 Scan367 | |
| Abrasive powder found transferred from a bearing to two leads. | 3rd Feb 1926 | Box 47 \ 1 Scan368 | |
| Clarifying Mr. Gibbs' first name and address in response to a query. | 5th Nov 1926 | Box 47 \ 1 Scan369 | |
| Customer's complaint of intermittent popping in the carburetter, suggesting a broken tappet spring as the cause. | 1st Nov 1926 | Box 47 \ 1 Scan370 | |
| Comparing the petrol consumption of the Phantom model against the Silver Ghost, discussing the effects of front-wheel brakes and testing conditions. | 1st Nov 1926 | Box 47 \ 1 Scan371 | |
| Persistent engine noise complaint on a Phantom, chassis 89-DC, for customer Lt. Col. Peacock. | 12th Nov 1926 | Box 47 \ 1 Scan372 | |
| Experiments to find a cure for a car's trouble and instructing the Experimental Dept. | 12th Nov 1926 | Box 47 \ 1 Scan373 | |
| Recommended modifications for issues with steering and the petrol tank on chassis No. 24-RC. | 15th Nov 1926 | Box 47 \ 1 Scan374 | |
| Customer complaint letter detailing severe steering wobble and issues with the petrol tank filler on a 'New Phantom' during a tour of France and Spain. | 12th Nov 1926 | Box 47 \ 1 Scan375 | |
| Page 2 of a customer letter regarding radiator connection issues and a request for servicing. | 16th Nov 1926 | Box 47 \ 1 Scan376 | |
| Cover letter introducing a list of principal complaints for the Phantom & 20 HP models over a three-month period. | 16th Nov 1926 | Box 47 \ 1 Scan377 | |
| Quarterly complaints report for the 40/50 HP Phantom model, listing the 12 worst issues for the quarter ending September 30th. | 29th Oct 1926 | Box 47 \ 1 Scan378 | |
| Quarterly complaints report for the 20 HP model, listing the 12 worst issues for the quarter ending September 30th. | 28th Oct 1926 | Box 47 \ 1 Scan379 | |
| List of complaints for the 20 HP model regarding broken front springs and burning platinum points. | 17th Nov 1926 | Box 47 \ 1 Scan380 | |
| 'six worst features', noting steering issues are resolved, and proposing 'Tappet knocks and general engine noises' as the next priority. | 17th Nov 1926 | Box 47 \ 1 Scan381 | |
| Requesting updates on the 'Six Worst Features' including issues with silencers, indicators, ignition points, and engine noises. | 12th Nov 1926 | Box 47 \ 1 Scan382 | |
| List of queries and updates regarding vehicle component issues, improvements, and design changes. | 11th Nov 1926 | Box 47 \ 1 Scan383 | |
| Complaints and proposed solutions for the Phantom & 20 HP models concerning springing, brake servo, and throttle sticking. | 18th Nov 1926 | Box 47 \ 1 Scan384 | |
| Necessary improvements to a vehicle's carburetter, steering, and body. | 19th Nov 1926 | Box 47 \ 1 Scan385 | |
| Customer complaints about the Phantom model and the proposed actions and costs to resolve them. | 19th Nov 1926 | Box 47 \ 1 Scan386 | |
| Policy for handling car defects to protect reputation and manage expenditure. | 18th Nov 1926 | Box 47 \ 1 Scan387 | |
| Customer complaints and proposed solutions for the Phantom & 20 HP models. | 18th Nov 1926 | Box 47 \ 1 Scan388 | |
| Necessary improvements for the carburetter, steering system, heat insulation, and addressing steering wobbles. | 21th Dec 1926 | Box 47 \ 1 Scan389 | |
| Customer complaints about the Phantom model, comparing it unfavourably with the Silver Ghost, and outlining points to resolve. | 21th Dec 1926 | Box 47 \ 1 Scan390 | |
| Policy options for handling car defects and customer complaints. | 1st Nov 1926 | Box 47 \ 1 Scan391 | |
| Customer complaints about poor suspension, noises, and steering on chassis 19-LC (Mr. Mackinlay). | 19th Nov 1926 | Box 47 \ 1 Scan392 | |
| Consultation on changing wheels and tyres for chassis number 29-EE, belonging to Madame de Landa. | 19th Nov 1926 | Box 47 \ 1 Scan393 | |
| Tyre recommendations for Chassis 29-EE to prevent high-speed wobbles. | 20th Nov 1926 | Box 47 \ 1 Scan394 | |
| Modifications to address complaints on the Phantom model. | 20th Nov 1926 | Box 47 \ 1 Scan395 | |
| Cover note regarding the petrol tank for chassis number 24-RC for Mr. Stanley Johnson. | 25th Nov 1926 | Box 47 \ 1 Scan396 | |
| Customer complaints and required repairs for Mr. Stanley Johnson's car. | 24th Nov 1926 | Box 47 \ 1 Scan397 | |
| Fitting of a larger petrol tank with a side filler to chassis 24-RC for Mr. Stanley Johnson. | 29th Nov 1926 | Box 47 \ 1 Scan398 | |
| Testing alternative steering modifications for Phantom model cars. | 29th Nov 1926 | Box 47 \ 1 Scan399 | |
| Internal memorandum replying to a list of vehicle component issues and proposed improvements. | 29th Nov 1926 | Box 47 \ 1 Scan400 | |
| Continuation page of a report detailing the status of various design modifications and issues. | 29th Nov 1926 | Box 47 \ 1 Scan401 | |
| Various vehicle issues including starter failures, steering, clutch, brakes, and springs. | 29th Nov 1926 | Box 47 \ 1 Scan402 | |
| Engine and chassis faults, with corresponding remarks and proposed modifications. | 29th Nov 1926 | Box 47 \ 1 Scan403 | |
| Statement concerning oil leaks in the water pump drive. | 30th Nov 1926 | Box 47 \ 1 Scan404 | |
| From BJ to Hs regarding a policy for handling 'Phantom Complaints' while cars are being modified and tested. | 30th Nov 1926 | Box 47 \ 1 Scan405 | |
| From BJ to Hs regarding discussions on Phantom complaints and further modifications. | 2nd Dec 1926 | Box 47 \ 1 Scan406 | |
| Recommending against car 44-PK for H.R.H. Prince of Wales due to its condition and modifications. | 3rd Dec 1926 | Box 47 \ 1 Scan407 | |
| Successful resolution of springing complaints in France using French-made springs, with a note attached about car 19-LC. | 13th Dec 1926 | Box 47 \ 1 Scan408 | |
| Superior performance and comfort of French-made springs over normal springs on bad roads. | 11th Dec 1926 | Box 47 \ 1 Scan409 | |
| The performance of French-made springs, specifically their strength versus comfort on rough roads. | 14th Dec 1926 | Box 47 \ 1 Scan410 | |
| Arranging for a reply to be sent regarding 'Phantom Complaints', detailing the number of cars on the road and costs. | 16th Dec 1926 | Box 47 \ 1 Scan411 | |
| And prioritizing customer complaints regarding the Phantom model. | 21th Dec 1926 | Box 47 \ 1 Scan412 | |
| Breakdown of costs per chassis for various series and modifications, including steering complaints. | 21th Dec 1926 | Box 47 \ 1 Scan413 | |
| Actions to be taken regarding 'Phantom Complaints' and other referenced items. | 23th Dec 1926 | Box 47 \ 1 Scan414 | |
| How to handle complaints about the Phantom model, prioritizing a steering issue. | 24th Dec 1926 | Box 47 \ 1 Scan415 | |
| Process for collecting and reporting complaints for 40/50 HP and 20 HP cars to avoid duplication. | 3rd Jan 1927 | Box 47 \ 1 Scan416 | |
| Quarterly complaints for the New Phantom and late 20HP chassis for the quarter ending December 1926. | 20th Jan 1927 | Box 47 \ 1 Scan417 | |
| Quarterly report detailing customer complaints for the 40/50 Phantom model. | 25th Dec 1926 | Box 47 \ 1 Scan418 | |
| Summary table of complaints, number of cars affected, and remarks for the 40/50HP Phantom model. | 25th Dec 1926 | Box 47 \ 1 Scan419 | |
| List of complaints and remarks regarding the 40/50HP Phantom model. | 24th Jan 1927 | Box 47 \ 1 Scan420 | |
| Complaints of squeaking brakes on 'India' cars and proposing a damper as a solution. | 24th Jan 1927 | Box 47 \ 1 Scan421 | |
| Complaints and a new scheme for applying friction to the swinging link on the New Phantom and 20 HP models. | 28th Jan 1927 | Box 47 \ 1 Scan422 | |
| List of complaints and cures for 'New Phantom' vehicles, focusing on brakes and suspension issues. | 28th Jan 1927 | Box 47 \ 1 Scan423 | |
| Faults and resolutions for front springs, platinum points, and steering wobble. | 28th Jan 1927 | Box 47 \ 1 Scan424 | |
| Log of steering and suspension faults, issues, and their respective remedies. | 25th Nov 1927 | Box 47 \ 1 Scan425 | |
| Steering and engine issues, detailing observations, faults, and remedies. | 25th Nov 1927 | Box 47 \ 1 Scan426 | |
| Case studies and observations on resolving engine overoiling issues. | 25th Nov 1927 | Box 47 \ 1 Scan427 | |
| List of complaints and resolutions regarding noisy engine tappets. | 25th Nov 1927 | Box 47 \ 1 Scan428 | |
| Observations and resolutions for issues with engine tappets, clutch jaggers, sticking throttles, and water pump failures. | 25th Nov 1927 | Box 47 \ 1 Scan429 | |
| Pump failures, exhaust cut-out troubles, noisy engine gears, and noisy magnetos. | 25th Nov 1927 | Box 47 \ 1 Scan430 | |
| Complaints of noisy magnetos and the methods used to resolve the issues. | 25th Nov 1927 | Box 47 \ 1 Scan431 | |
| Customer complaints and resolutions for the 20 HP model. | 10th Feb 1927 | Box 47 \ 1 Scan432 | |
| Noise and vibration issues on Chassis No. 120-LC, attributed to Dunlop high-pressure tyres. | 10th Feb 1927 | Box 47 \ 1 Scan433 | |
| Suggestion to test various types of tyres to investigate noise and effect issues on a particular car. | 10th Feb 1927 | Box 47 \ 1 Scan434 | |
| Tyre noise issues, potential solutions involving subframes, and proposed testing methods. | 1st Feb 1927 | Box 47 \ 1 Scan435 | |
| Arrangements to investigate and compare worsening tyre noises on a car. | 16th Feb 1927 | Box 47 \ 1 Scan436 | |
| Investigation of tyre noises on Mr. Spyers' car by liaising with Dunlop. | 17th Feb 1927 | Box 47 \ 1 Scan437 | |
| Letter discussing borrowing a car to be sent to Derby, possibly to investigate tyre noise. | 19th Feb 1927 | Box 47 \ 1 Scan438 | |
| Typed letter regarding the arrangements for the handover and testing of chassis number 120-LC. | 28th Feb 1927 | Box 47 \ 1 Scan439 | |
| Complaining about the unsuitable and mixed brand tyres fitted to chassis 4-NK, causing poor performance. | 3rd Mar 1927 | Box 47 \ 1 Scan440 | |
| Returning a list of quarterly complaints stating no further alterations are required. | 3rd May 1927 | Box 47 \ 1 Scan441 | |
| Quarterly report on prevalent complaints for the New Phantom and late 20HP chassis. | 4th May 1927 | Box 47 \ 1 Scan442 | |
| Quarterly complaints report for the 40/50HP Phantom model, detailing issues and proposed solutions. | 25th Mar 1927 | Box 47 \ 1 Scan443 | |
| Summary report detailing car complaints, the number of vehicles affected, and remarks on resolutions. | 25th Mar 1927 | Box 47 \ 1 Scan444 | |
| List of vehicle complaints, the number of cars affected, and engineering remarks for resolution. | 25th Mar 1927 | Box 47 \ 1 Scan445 | |
| Fabric coupling failures, the number of cars affected, and proposed solutions. | 13th May 1927 | Box 47 \ 1 Scan446 | |
| List identifying the 'worst features' of the New Phantom Six model. | 13th May 1927 | Box 47 \ 1 Scan447 | |
| Six worst features of the New Phantom and the proposed solutions. | 28th May 1927 | Box 47 \ 1 Scan448 | |
| Investigations into the burning of platinum points and overheating in the car. | 10th Oct 1928 | Box 47 \ 1 Scan449 | |
| Complaint from an owner regarding draughts experienced due to an open space at the change speed gate bracket. | 10th Oct 1928 | Box 47 \ 1 Scan450 | |
| Recommendation to fit rubber engine mountings to car 2-CL to eliminate roughness at 40-50 mph. | 31th Oct 1928 | Box 47 \ 1 Scan451 | |
| Forwarding test results for different spark plug brands on an overoiling engine in chassis 76-RC. | 5th Nov 1928 | Box 47 \ 1 Scan452 | |
| Forwarding a customer's complaint letter regarding steering trouble with chassis 117-MC. | 2nd Jul 1927 | Box 47 \ 2 Scan001 | |
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