Does anyone know if i fit a MY10 rear bumper to 07 sport can i fit my old PDC if i drill holes bigger or do i need new sensors & wiring, also do i need any new brackets.

It will fit but definitely need new sensors and a adapted wiring loom - there is a video on Powerful UK that shows you how to remove the old bumper - if you have mud-flaps they need to be replaced to a newer version also. It took me a couple of hours & that's with taking my time and attaching new mud flaps - if your new bumper is a take off from another vehicle the chances are bits will be missing - reflectors & PDC sensor brackets - they can be brought & glued or plastic welded back in place - beware there are 2 types inner & outer you will need 2 of each. I have the rear 12MY rear lights & the bumper with the reflectors makes a real difference.  16MY Estoril Blue SVR.............
17MY Autobiography Dynamic - Corris Grey - WOW.
14MY Autobiography Dynamic - SDV6 - Fuji White
12MY Autobiography - SDV6 - Santorini Black - Dual View - Rear Entertainment - Sunroof.
12MY Autobiography - SDV6 - Orkney Grey - awesome ;(
2005 Java Black - 4.2 V8 Supercharged First Edition- will never be forgotten ;(