I'd be careful and check this out with the CAA if I were you.
LASORS (Section C) states that:
"however the specific requirements under JAR-FCL (25 hours dual instruction and 10 hours supervised solo-flight time) must be completed in the state under whose authority the training and testing are carried out."
This has been discussed in previous threads and the consesus was that all the training (i.e. the 35 hours as described above, plus the exams) has to be done under the authority of a single member state. This would not allow for a pilot starting training in one state and competing in another. (Don't confuse this with training in the US - pilots who go there from the UK generally train under the authority of the CAA). I don't have time to hunt down the old threads, but they are out there - in the Private Flying forum.