If you look back on my earlier Thread which I would like you to read, titled “Merlin Identification Help” on the 13/12 Saturday which was answered very professionally by Merlin Pete you will see that my idea of location is based purely on assumption I brought these couple of bits at a military fair ages ago and was told by the seller he got them from a retired school teacher who lived in the gravesend area and that is where the assumption is based, They could come from anywhere and not necessarily from a excavation either and I also do not have a clue who either the seller or the original owner are I wish I did I could ask them the questions . Also if you check Merlin Petes answer you will see he has checked with RR Heritage and the parts and they are not logged to a airframe.