Gedney Drove is not a head end exchange, the FTTP will head back to the larger Wisbech exchange, which is also the headend exchange for Long Sutton.
I think this is vital information for the OP, if both his local exchange areas (Gedney and Long Sutton) go directly back to Wisbech exchange for FTTP there is no issue. The person who told him their was is clearly wrong.
Can the OP explain what happens when he tries to place an order for FTTP.