alec
I think the point really is that you want to do your training in the same place as you do the skill test . When BA , Aer Lingus et al were putting students through OATS a couple of years ago the majority of training for the CPL skill test was conducted in Florida or Arizona . The test however , was conducted at Kidlington with a relatively small proportion of the VFR syllabus flown in the U.K for pre-test prep . It was not uncommon for students to encounter some difficulty adapting to nav in the U.K. ( and conversion onto a complex type ) in limited time when they had been used to a somewhat different environment . This has now changed with all VFR & the skill test conducted in the same place .
Incidentally , I think your reference to Scotland may be something to do with Bae Systems who used to have a school there - it is the one now at Jerez .