Always challenge any increased renewal quotes you get, for any kind of insurance (home, car, travel etc). It's worth phoning the company and telling them you've been on a comparison site. They always, always offer you a better deal.

This ridiculous palaver every year makes me fume. They're obviously counting on people not having the time or inclination to challenge or negotiate. But I nearly always get the premiums down to what they were originally. (Perhaps it's my very stern schoolteacher voice!)