Erm, no. Red Bricks are ex-polytechnics or newbuild universities, generally specialising in quality degrees like urban forestry and golf course management. Oxford BROOKES is an example of a red brick. But not Oxford.
No. Just no. You are wrong. Red brick universities are not ex-polys. Just read the Wikipedia link in the parent post. I went to University of Sheffield, which is one of the Red Brick Universities and it has always been an Uni. Sheffield Halam, however, is the ex poly.