I'd say any decent insurance estimator will know what a Stylance 'should' look like so I reckon he'd do 1 of 2 things in the case of an accident.

Notice the FR bumpers and investigate further - more likely if he's any good at his job.

or...

Not notice the FR bumpers and whack on a set on standard ones, as per the VIN.


I'd leave it alone...
 
Cheers for the advice, convinced me to inform the insurance about the bumpers and wheels. Boss said it wouldn't cost anymore as all the vehicles are covered under a fleet insurance, which they pay a lot for, so such minor alterations wouldn't affect cost. Brill. Suppose its no different to letting them no I fitted my own cd player and a towbar really. Neither cost any more. I'm looking for fr front and rear bumpers. However I've noticed that the only difference between the standard rear bumper and the fr one seems to be the black plastic piece (which I'm told is detachable) that the number plate fits onto. Is this compatable with my stylance rear bumper? I notice some rears on ebay come without them anyway. Anyone got a cost of this part? The boot spoiler is only 30 quid new so no point searching for second hand. Help appreciated as always.