Im also training towards my ATPL (modular route), I'm just about to take my PPL skills test at Old Sarum Flying School, who I would highly recommmend. New aircraft, great airfield and good group of instructors. Also for under 6k I dont think there is anyone cheaper in the UK!
I then plan to do some hour building in the UK and some abroad, for the same reasons as have been mentioned. To gain valuable flying experience in foreign countries and to also enjoy my journey through training rather than focusing purely on the final goal. I have thoroughly enjoyed my training so far, partly because I am not rushing through it.
After doing my PPL training in the UK and speaking with people who have done PPL training abroad and in the UK, I am glad i have done my initial training here. I feel very confident in the skills I have learnt and am looking forward to flying to new airfields during hour building...not so much the ATPL theory which I will be doing along side the hour building!!