Do you not have access to a search engine? I got a dozen articles on it from a quick search.
It is (or perhaps was, it is still around but today goes under the name UKIE/The Association for UK Interactive Entertainment) mostly a UK trade group (it started out aiming to be European but never quite stuck the landing so retreated to the UK) doing all the sorts of things trade groups do (voice in government, lobbying for tax breaks, trying to ensure integrity of product aka anti counterfeiting and anti piracy efforts, some promotion around the world, at one point tracking sales data...) for "entertainment software publishers"* and much like trade groups elsewhere** it also had a hand in ratings for games within the UK (while the...