Not something I've done "to" my car but my insurance renewal is August 4th and I've been looking at prices.. Aviva are winning by a good margin at £417 at the moment.. Pleased with that! Admiral don't seem to be cheaper than ~£515 so unless they can match Aviva (or get near to) when I phone them up, I might finally have to leave them after all these years!
Worth phoning the likes of Sky, AF and Greenlight, might be able to shave a few quid off. They managed to beat all the price comparison sites last time I renewed anyway.