The hangar in the background of the photo in #29 looks a lot like the hangar shown in the right hand side of OP’s photo. I can’t match the hangar with any that are part of the Solway Aviation Museum these days. Have they moved site, demolished hangars etc?

I suppose ‘Cranfield’ and ‘Carlisle’ look somewhat similar. If you had a busy season zipping around the UK in 1989 photographing aircraft then you might think the photo was taken at one when it was taken at the other, especially if you waited a while to develop the film. If OP’s photographer also photographed the Lightnings at Cranfield then he probably put together all sightings of grounded/parted-out Lightnings as ‘Cranfield’ for 1989.