I would completely ignore the main dealer report if I were you, the fact they want £115 to supply and fit a mud flap would have me asking questions for a start.
I made the mistake of taking my 9 year old passat to a main dealer for a service. By the time they had read off the list of things they wanted me to get done (just down to the age of the car never mind if it needed done btw) I would have been looking at a bill for more than the car was worth.
The best one was they wanted £400 to supply and fit a new undertray as they old one was cracked and there was some clips missing. Never again.
Also I find the main dealers definition of "badly corroded" and "excessive play" to be quite different from your average mechanics!