First, read your car owner's handbook and check what type of headlamps you have fitted.
If you have Xenon headlamps, it may mention that you have a manual adjustment lever to flip the headlamps from UK asymmetric pattern to the Europe symmetric (straight ahead) beam pattern.
Importantly you can't mask Xenon headlamps - so it's either flip the lever or speak with the dealership
If you have "standard" Halogen headlamps - then masking the headlamps is an option (but again you may have a dip correction adjustment lever) but if you don't have "guidelines" on the lamps - then it's a good idea to buy the plastic headlamp protectors that clip over the lenses.
These clip-ons usually have the guidelines in place and you can then permanently mask a set for driving in Europe. But again - don't fit a mask if you have Xenon headlamps.
Robert