Saga
I had a run in with Saga over renewing my car insurance. The premium went up by 70% from £400 (I live in SE London!!) and Saga said it was because I lived in London. I had lived in London the year before when they charged me the £400 fully comp! I have never had a claim but they offered me a 10% reduction on the 70% increase.
Upshot was that I went to Admiral for about £425 and last year at renewal time my premium actually went down!!!!!!!
When Saga first started up and was a private company, they specialised in the "over 50's" market which was a very good business plan. Everybody who was with Saga seemed to be getting a reasonable deal, so why change. However, SAGA are now owned by a private equity company whose business model is to load up the company with debt and then sell it on at a large profit.
Suddenly Saga became just another insurance company offering a low teaser premium to get you to change to Saga, and then hammer you on renewals because the older generation tend not to move insurance companies that much.
The original ideals on which Saga was based were good, now it is "buyer beware"