have you seen my car? its crying out break into me im easy. Only they will find enough immobilisers to sink a ship!!
Kev, I think you are over gilding the lily a wee bit.
I've seen plenty of cars at Stansted's long and medium term carparks (as I use them regulary) that are probably far more exotic and desirable from a 'breaking in' point of view than your pride and joy - no offence meant. No breakins.
My wife has parked her various V8 engined beasts there without problems. Once she went away for a week having accidently dropped her keys by the car in the carpark. The keys were handed in to lost and found.
The official 'on site' car parks have satisfactory security measures / cameras / patrols and aren't a problem.
I would, however, steer well clear of those cheap and cheerful 'valet' park-it-in-a-field places that are off-site.
You pays your money etc etc......