Who hour builds in the UK?
People who want to become familiar with the airspace, terrain and R/T in the area in which they are most likely to later be paid to fly and instruct?
People who would like to build a relationship, rapport and trust with a company for whom they might later like to work?
People who have houses / jobs / friends / families here and don't want to either live abroad or keep having to travel there every time they want to fly?