That was a real surprise Feroxeng! Great you have one too… My airfield was shut by the time Lincolns came into service. So far we seem to have ruled out Stirling and Halifax. I confess I wouldn’t know what a Whitley glider release handle looked like if one came up and bit me! Air Min’s Lanc comment and the Avro link suggests a Lanc may be a possibility.
It’s quite crude so I did wonder if it was a mod.
Do you know what the two screws are for?