I recall that you fly from Sherburn ?
Some of the Warriors there have RNAV kit fitted. A common mistake when using this is that you have ENR (en route) selected rather than VOR. If so, you will ident the VOR without any problems but it will be transposing the VOR to some other point programmed in by a previous user. Therefore the readings would be different to what you expected.
I am surprised none of the instructors there remembered this, if that is where you flew from.