ok so i finaly got a day off today. managed to get the car up on the ramps in my mates garage. we checked everything underneath. sub frame, engine mounts, gearbox mounts. suspension, the lot. they were as tight as they can get. took it for a drive and nothings changed. still knocks on the bumps.
as for the knocking on speeding up and slowing down, that seems to come and go as it pleases. I was driving down the road the other day and it was knocking. there was a nasty hole coming up in the road so i thought 'f$ck it! im gunna hit it and see if it sorts the problem' funny enough it did for about 10-20 minutes.
anyone ells have any more ideas? hoping im slowly closing in on the problem