That is how I look at it stephen,they might have kept some components like the pilots seat and control column maybe 🙂 and then wheeled a new aircraft under them…as you said most manufacturers were/are evolutionary and one can see same or similar design features in their different aircraft !

Which probably explains why youn strip them of fabric and see hints of the Hurricane in the Sopwith Camel. Or ‘tother way round would be moree correct.