Recently it got a rip in it so it started leaking from the bottom of the door (the cat is a suspect LOL). Anyway, unusually for me I decided to get a quote from a local (checkatrade) trader. He wanted £130 and as one can get a new one for about £25 mrs decided he was having a larf and told me to get on with it. Looked at Paul Charmbury's videos for half an hour and got on with it. It's a bit of a wrestle getting the retaining springs back on but in the end got the whole job done in about an hour. Conclusion, don't rely on checkatrade suggestions, some of their members are rip off merchants. Thing is, if he had asked for a sensible price, say £50/60, I would probably have given it to him.