Marsh has advised clients that cover problems may occur after recent rioting in the UK.

Coverage problems could centre around 'specific interpretation of clauses and wording, security and other additional costs incurred, business interruption as a result of closure of premises on a precautionary basis and the number of losses and deducibles that will apply,' according to a Marsh document.

Marsh also advised clients to back up any vital information about their businesses and then take that information off-site.

Clients should check their premises are secure and that nothing is left nearby that could be used to damage their businesses, Marsh advised.