Sadly because of the language difficulty, my German extends to ordering beer,coffee or chips, we left it all to the police. I do have the registrations of the vehicle that caused the accident and the witness. I will be writing to the police over the weekend and asking them if they have lost all record of the accident why they can't re-interview the driver and the witness.
Dave, sadly Saga have reached a dead end, without a police report they don't have any way of forcing the other insurance company to cough up!