Plumber in NW London (and a call to Pigletjohn!)

[dottygamekeeper]

I need a plumber to replace the flush on my concealed cistern dual flush loo - the current flush is a Grohe one, it no longer flushes because the cistern is constantly trickling into the loo, so it never gets chance to fill up properly.

I have removed the front panel and looked inside but can't see what is wrong...

Any one who can recommend a plumber, ideally fairly local to Kentish Town/Chalk Farm.

And maybe PigletJohn, any idea how much this might roughly cost?

Bumping to catch the evening crowd - anyone with suggestions of a reliable plumber in NW London?

We always used Pimlico plumbers - we lived in nw2, n1 and e4 and they always came to us

Can't recommend a plumber but I had this problem. I explained it to the bloke in B&Q,he told me what part I needed to buy and my friend and I fitted it. Cost lest than £20.
Having said that,I totally get why you might not want to diy.