The Prone Meteor.
A Meteor 8 with what looked like a glider cockpit welded to the nose.
In it, a second pilot would lie flat on his stomach with his head supported by a chin rest clutching a mini control column and throttles.
Great when pulling "G" especially if you didn't like the seated pilot behind you.
I had it in the Colerne Museum and it was last seen in the Cosford collection.