i no longer have the heat shield rattle but a friend of mine with a ba has a scraping/rattleing noise but it only happens above 70mph, is it the heatshield?

i remember mine used to do it at a certain rev range in almost any gear but he says he only gets it above 70, after hed been had for almost three hundred quid by a local garage hes not too happy as they didnt get rid of it, they told him he needed new brakes, calipers, discs, etc and now all the works done the noise is still there, i told him before he went to the garage it sounded like a heat shield and hes finally conceded i might be right, im gonna check it for him next week but if it isnt the heat shield any other suggestions?

iv not heard the noise yet so cant really say wheather it sounds like the heat shield