ok made a few calls to the DVLA and it was their wheel clamping contractor NSL that clamped the vehicle at 9.09am this morning due to expiry of tax. The clamp will only be removed if a fine of £260 is paid within 24 hours i.e. by 9am tomorrow. I'm actually considering paying the fine on the owners behalf but i'd need to tax it too if it wasn't to be clamped again but i don't think this is an option.