It was a 'c' I have done it now.
You need to get the rear wheels off, so you can get to the nuts.
I took the bumper off, on Monday, ordered the part on Ebay, it arrived yesterday, & I fitted it.
The actual light assy fits into a plastic moulding that is welded to the main bumper, both of these welds were broke.
I used a soldering iron to re-weld the parts back, also for belt & braces I used hot melt glue.
If I say so myself, I think I have done a good job, its a time consuming job with a £10 part.