As from 31 December 2016, your motor insurance policy must include cover for damage to property (be it someone else's car or their brick wall) for up to at least £1.2m. This is an increase of £200,000 on the previous figure. Happily, most insurance policies already provide even more cover than the new minimum figure. If any don't, the insurer must now up the figure.
When you come to renew your policy, your insurer might conceivably ask for an increased premium. Really! They may rely on increased car repair charges, the cost of fraudulent whiplash claims, that the name of your street starts with an 'R', the time of day or....compulsory insurance cover for damage to property having gone up by £200,000. On the last point, don't let them get away with it. The government consulted on raising the figure and they were told by insurers that few £1m property damage claims were made and that they did not think the increase in the minimum cover would lead to any significant increase in premiums.