Who actually has the car now?

Is it worth more than £300, if with an MOT. then pay it and sell it again...?

Edited by _ORB_ on 16/07/2022 at 15:57

...not providing the details can mean that you are still liable for any offences or penalties, if the buyer breaks the law

That’s not entirely correct.

For matters that rely on the identification of the driver (such as speeding, careless driving, etc.) the police contact the Registered Keeper (RK) to obtain the driver’s details. They do this using powers they have courtesy of section 172 of the Road Traffic Act. That legislation says that “the person keeping the vehicle” (who may or may not be the RK) has a duty to provide the driver’s details. “Any other person” has the duty to provide “any information which it is in his power to give and may lead to identification of the driver.”

The OP in this case is clearly and obviously not the “person keeping the vehicle.” He therefore has the much lower burden of providing any information that may lead to the identification of the driver which he can (which, from the sound of it, is not very much). If the police prosecute him under s172 on the basis they believe he is the person keeping the vehicle, it will fall to them to prove it. And they may struggle.

What else can I do?

Perhaps not very much. Your response may sound to TfL like an obvious one from anyone wishing to avoid paying a fine. Assuming TfL notes your responses, a copy of a death cert might work, but I doubt that you have one of those :-)

We sold it for £1000 and don't won't it back, so will let them keep it to recover their costs.

Pay the £300 and sell it again.