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In that case, Chamonix will probably be your best bet for an english speaking guide. Otherwise just have a google for climbing centres that are on or near your route, and call to find out who can do a reasonably priced, English (I'm assuming), private course. Most walls will hire you a belay plate and rope, obviously this is trickier if you want to go outside.
The forum "UKClimbing" (2nd friendliest place on the internet) is a good source of all things climbing in Europe.
Thanks, guys. There's no "before you go", unfortunately - we're heading home. (Although I tried to do a course in Helsinki before leaving, but the session I could make was full). So, looking to do a top rope training somewhere else on the way to get a day or two climbing in. It would be nicer were it included some outdoors climbing as well. As would any additional, appropriate, skills training.