NI don't do PDR, but let me know where you are and i might be able to put you intouch with someone, thanks.
Im in tipton west midlands mate,only asking because ive been quoted something like £40 for one small dent in the rear quarter about the size of 2p peice,and i reckon thats ridiculous,as i have a few more in the doors i need doing. 
why dont you get a dent puller dif types for dif dents start from £6. easy to use, or a panel beating kit.
Not the same mate as what they use,its specialized equipment and i beleive is very expensive.Dent pullers will just remove the depth of the dent and will not do it to perfection. 
I have a full kit, got a dent kit when was 16 at collage, its not expensive buying the kit, if a bad dent it will need to heated up as the metal streches. a vac dent puller will cost a bit but still under a £100.