When I was working for VW, we would always ask customers if they wanted a formal handover or a simple one.
Either way, it would be Flowers/Champagne/Sport brolly type gift to be presented at the end of the handover. The car would normally be roped off with/without a cover (depending largely on whether the cover was in a good enough condition!).
Remember each one of us who have bought from a retailer will be contacted by VW UK after collection, and we will be asked to rate our experience from start to finish.
This score is worth £1,000's to each retailer in terms of additional payments from VW, so they all want to make sure they do it right, and it is a special occasion for you.
If you have bought through Fleet (so broker etc) then these retail bonuses dont apply. Therefore they are likely to just point you in the direction of the car sat outside, and tell you to "crack on".