Firstly before even contemplating making a claim Have you reported this to the police? The insurance company will only ask. You have a duty to report the accident to the police if any of the following apply.
Owing to the presence of a mechanically propelled vehicle on a raod or any other public place and accident occurs by which, Damage is caused to another vehicle other than that vehicle or trailer. The driver must stop and report it and if so required to do by any person having reasonable grounds for requiring it. Give there name and address, the owners name and address and regisration number of the vehicle.
The above is required and if anyone fails to do so at the time they must do so at a police station or police officer as soon as reasonably practicable and in any case within 24 hours.
There is a specific offence under sec 140(4) RTA 1988 where it is an offence for a driver of a mechanically propelled vehicle to fail to report to accident to the police if they fail to give their name and address.
So if the T xxxxx er hasnt done any of the above and you are still contemplating an insurance claim cover your back.