The headlight washer isn't a dead giveaway.
Yes, xenon headlights are required to have them, as per EU directives,
so if you don't have them, you can be sure the lamps are halogen.
However, if you do have them, the lamps could be either type.
In the Nordic countries (except perhaps Denmark), headlight washers are common on halogen lights too.
I find it strange that it's not more common in UK and Ireland, with the mud and weather that one gets over here.
Most xenon lights also have a golfball-sized lens inside the headlight housing on either size.
Your Scenic should not be an exception to this (unlike the Laguna II phase 1,
where having "Xenon" written in the lamp housing is helpful as to what replacement bulbs one needs to order).