Which bits?
the number plates and the the chassis number?
Cheers
Firstly I know now't about defenders other than they are noisy and get nicked a lot (and I would still like one) but I believe in general it's the chassis that goes with the V5.
Since the reg and chassis match the V5 is it possible that that the OP is worrying over nothing. Just trying to give them a glimmer of hope.