I have a 2001 Golf TDi 130 that has developed a leak from the fuel tank. When it is full to about 3/4 full it drips diesel out.

It was first noticed last Oct when it went for MOT. My garage removed the tank and couldn't see anything obvious. They tightened a breather(?) attachment point and it then passed the MOT. However this hasn't solved the problem as it occurs on every fill up.

Any advice or pointers gratefully received.

Thanks
Graham