A MoneySuperMarket expert has warned there's a simple - but common - mistake people are making which could void their home insurance, costing them in times of need.

Home insurance experts at MoneySuperMarket have stressed a faulty burglar alarm could nullify home insurance, with some insurers refusing to pay out if your system isn’t up to scratch. When applying for home insurance, a common enquiry is whether or not you have a burglar alarm. If you declare to your insurer that you do have an alarm but it fails to activate during a break-in, your insurer could refuse your claim.