Written by John Kruse, one of the leading experts on Bailiff Law, this consumer friendly guide is essential reading for anyone who comes into contact with a bailiff.
The book is easy to understand and clearly explains the rights
a bailiff has, and also what they cannot do when collecting debts and repossessing goods etc.
I would suggest that you write back to the Met and ask them if they can provide you with a photograph to assist you with identifying the driver of the vehicle. Wait until the 28 days you have been given are almost up before making the request. Do not ask them for evidence as they don't have to supply you with any prior to any trial being heard, just ask for the photo to assist with identification of the driver.
A Google search of "fightback forums" could be fruitful for you too, in terms of additional advice.