Hi Andy i was misinformed regarding cutting the bumper so i have a similar cutout as you. my towbar people (in Birmingham) did a great job, i am pleased they fitted a Witter towbar with twin electrics cost £234. however there was a hiccup, the fitter broke the treadplate trim by the rear door, they route the cable here. i was informed by phone so when got there they said it had been repaired and they would allow some money off the bill. I wasn't having that and refused to pay until my Fiat dealer could price up a new part. the boss okayed this so today i was quoted £57.70 supply and fit and booked the car in for tomorrow. returned to towbar fitters where i paid £176.96 for the towbar of course i still have to pay the £57.70 tomorrow for the trim but alls well in the end.