Thanks Jenkinov, I've ordered the book.
I managed to check the date stamp which looks like T.E.C.7.40 but I suppose it could be T.E.0.7.40 as its "C" is not too clear. Does 7.40 mean its made in July 1940?
Frame number will need to wait until it comes back from sand blasting as its not clear enough to read accurately. it does start T.L.211?? which I think is T.L.21170, but will confirm later.
Engine Number is 3SW 40286.
I'll post pictures as the resurrection progresses.
Thanks again.