Booth11 is correct regarding the detailer correcting the paintwork if the dealer causes swirls, but there are two negatives to that:
You'll be paying more for the correction
You'll be removing (albeit only a small amount) lacquer unnecessarily
If you can find a detailer that will carry out the detail at the dealership, you'll probably find that the dealership will allow the detailer to remove the transport packaging (or at least do that while the detailer is present). Lowest risk of damage that way.
In terms of using £ per 5 minute jet washes, you can still use the 2BM - carry warm water in empty pop bottles, or empty 5L screenwash bottles etc. Get two codes for the jet wash, use on to pre-wash, then 2BM wash with the products and buckets you've brought with you, then use the second code to rinse off - drying towel with your choice of drying aid after that.
Just seen your post pop up before I post the above, the car may look swirl free thanks to fillers and glazes, the reality is probably somewhat different (although some dealers are actually pretty good, so I'll give them the benefit of the doubt in this case). That said, dealership protection products/packages are never worth the money.