Improving your home's security is an important way to cut the price of your policy. Homes with higher quality locks and alarm systems, as well as more secure outbuildings and garages, often benefit from a reduced premium.
If you spread your payments across the year, you'll usually be charged interest. You can lower the cost of your insurance by paying for your policy in one go.
You can also look to increase your excess. Usually, the higher the overall excess, the lower the premium. Just make sure that the excess is affordable if you have to make a claim.