Posted: 24/09/2012 at 12:04
Thanks for the advice, I feel silly for not thinking of a local museum myself. 
Mummy, the spoon is not very old as it's an early form of electroplate, unfortunately. I hope once you've battled your way through the brambles you find wonderful things in your garden though. 
Gary, thanks for the link I'll have a look in a minute and report back. We've been sieving the soil to break up large lumps of clay and remove countless flints to a depth of about 18 inches, the bits of pottery and that are all kind of by-products of trying to sort the soil out. I agree with you that it's most likely to all be from the Victorian era apart from quite a lot of pieces of Kent peg tiles and a few small unglazed terracotta pieces.
We have asked the locals but the area the allotment is in is relatively new to housing having grown in to a commuter town for London, little remains of the small villages the towns swamped, and those who remember the area as it was are sadly very rare.