Ah ha!
I took my Skoda into my friendly garage (Aladdin - Jericho - Oxford) to enquire if my Xenon's can be converted. They do a lot of conversions for the local transient population.
It's a 30 minute job once you know how (quite a bit longer the first time) - there is a small black lever on the Xenon bulb/lens which has two positions (one for LHS kick-up, and the other position flattens the beam). There was a bit of fiddling around with the a mask that obscured the beam (so had to take the bulb out of the lens assembly an poke around a bit - glad the chap in the garage did that with a £600 bulb and 42kV electrical system!).
Hopefully now all OK for Dutch registration
Thanks Aladdin
Roger