d
Brooklands Aviation (later Westland) apparently had a factory in the Doncaster area which made parts for Lancasters as well as doing other things.
Emeltom
Westland made the Lysander.
500 Westland Lysander Mark III aircraft were ordered, but only 17 were built at
Westland (Doncaster) Ltd., as W6939 - 6945 and W6951 - 6960 Mk III and the remainder were cancelled.
If 500 Lysander aircraft were all ordered from Westland, but only 17 were built and
if all the 500 Lysander aircraft were intended to be built at Doncaster, then this suggests the Doncaster plant was diverted onto other work.
Information from:-
"Lysander Special" by Bruce Robertson, First Published 1977, page 59
"British Military Aircraft Serials 1912-1966" by Bruce Robertson (Revised Edition 1967)
---------
Some general information here
https://www.gracesguide.co.uk/Avro1939 publication indicates A. V. ROE & Co. Ltd., was a Branch of Hawker Siddeley Aircraft Co. Ltd.
The Lancaster bomber manufacturers were:-
1) AVRO (A.V. ROE & Co. Ltd.) of Manchester, others built at Yeadon
2) METROPOLITAN-VICKERS
3) VICKERS-ARMSTRONGS (Castle Bromwich) 200 ordered (100 cancelled) PP663-695; PP713-758 and PP772-792. Others cancelled.
4) ARMSTRONG WHITWORTH AIRCRAFT
5) AUSTIN MOTORS
240 + 280 Avro 683 Lancaster Mk I were cancelled with Vickers Armstrongs (Chester)
250 Avro Lancaster/Lincoln, cancelled order with Metropolitan-Vickers
37 were built by Metropolitan Vickers, but assembled by A. V. ROE (at Woodford)
The predecessor of A. V. Roe & Co. Ltd. (AVRO), was A. V. ROE.
Part of A. V. ROE became:-
SAUNDERS-ROE (SARO) Isle of Wight and Hants and the other part of A. V. ROE became
A. V. ROE & Co. Ltd (AVRO) [who made the Lancaster and other aircraft].
Later SAUNDERS ROE (SARO) were absorbed with Helicopter Div (Bristol) into WESTLAND AIRCRAFT, to become Westland Helicopters.
It does look as though there was a ROE and a WESTLAND connection AFTER WW 2 (by about 1959). Perhaps Lancaster parts were Sub-contracted, possibly to Westland or another Company in Doncaster?
A 1931 reports say WHITEHALL SECURITIES had a large holding in Saunders-Roe Ltd.
Rollason Aircraft Servicing - Doncaster, 1935Mr. W. A. Rollason, managing director of Rollason Aircraft Services, Ltd., has been appointed technical director and his company will service the machines at Doncaster, Leicester, Norwich, Birmingham and Croydon.
Mark