Mystery Airfield in the enquiry last year.

Yes it looks as though it was  Hucknall
Another experiment was Avro Lancastrian Serial No, VH742 at Rolls Royce flight development airfield Hucknall. The aircraft arrived there in October 1945 and had the two RR Nene engines fitted in place of the two outboard Merlins, first flight was on August 14th 1946, a second Lancastrian S/No, VH737 was also fitted with the Nene engines. Another pair VM732 and VL970 were fitted with Avons. Lancastrian VM703 was fitted with DeHavilland Ghost 50 engines for tests prior to being fitted in the first true jet airliner Comet 1.

The first prototype Lancaster bomber S/No BT308 Had a Metropolitan Vickers F2 Freda turbojet engine fitted in the rear fuselage and first flew with the engine on the 29th of June 1943 as a test bed. The aircraft was originally built at Ringway airport and first flew on the 9th of January 1941