well found out what the problem was

it was the left rear engine mount ( near the header tank)


the nyloc nut had come off the bolt and allowed the engine mounting to come loose from the body. the noise coming from the rear wheel arch was the exhaust clatering the underside of the car.

fixed it though , with a trolly jack under the sump a pad made from ploy bags and rice and a sock. slowly jacked up the sump with the pad between the jack and sump and bingo got the bolt though the hol;e and a new nyloc nut torqued to the max.

so go and check your guys, beacuse i never notice it maybe because every time i had a look it was dark.

wonder what else it has fooked up