Thank you for your replies, I looked into the HE270 route but couldn't find any images along with the aircraft serial number but as yet nothing there either, as far as the Whitney is concerned I'm thinking this is more likely especially with the inspection stamp and number as it could possibly point towards Armstrong Whitney, the image that Madura kindly posted kind of resembles the back of the rest as it curves very similar, ideally as MiTasol suggested if someone had a part list for Whitley then this could possibly help with its identity.