Car appreciation... the aesthetics, the engineering, etc

Can anyone recommend an honest, reliable mechanic south of the river (SE1, SE11, somewhere central ish?) who preferably does VAG (golf mkIII in my case) but I suspect that any mechanic would be able to figure out the massive clonking on gear change 1/2/3 at low speed I am currently experiencing....

thank you

What kind of clonking and when? This place is really good:

http://www.allinlondon.co.uk/directory/1075/132690.php

He's looked after my MKIII several times and is honest, main guy's name is Andy. What's the mileage and model of your Golf?