LONDON (Reuters) – Britain should place stringent regulations on electric scooters if their legal use is widened beyond current government trials, given the number of injuries from illegal vehicles and fire risks from their batteries, insurers said on Thursday. Trials of shared rental e-scooters are taking place in 31 regions of England this year, according to the UK government. But privately owned e-scooters are already a familiar sight on city streets, even though their use is illegal outside private land with the landowner’s permission. There were 882 accidents involving e-scooters in the y…