Can't remember the exact figures, but the FOS (Financial Ombudsman Service) make car insurers pay a certain percentage of the amount due to be paid out (on total loss and theft cases) per day the claim was delayed.
So on a round figure, if the claim was delayed for 10 days, and compo was at 10% of a �1000 settlement per day, you would be entitled to �100 a day for 10 days (IE another �1000), but I'm pretty sure it's considerably less than that.
When we get cases like this where we have caused an unjustifiable delay for whatever reason (lack of manpower, lost letter's, etc) we have a department that works this all out in accordance with FOS guidelines.
From an insurance point of view, I can see the issues here have been mainly human error, but I have to say that the police are sodding useless when you need a report. The MET (for example) can;t decide where you need to apply for a report from, and either needs cheques made payable to:
The Metropolitan Police Service
The MPA
MPA
And dependent on when and where the cheque has to be made payable (and assuming you get it right), they can take months to send the reports out.
Delays in getting a report can also be caused by the police losing the report (seen this), giving the policyholder the wrong reference (seen this), having the wrong details on the PNC (seen this), or having outstanding investigations but won't give the insurer any details over the phone due to each individual police force interpreting the data protection act in different ways!
That said, I can fully appreciate your situation - it's not funny, and it's very stressful. If it's any consolation, the FOS will charge your insurer several hundred pounds for the benefit of you refusing to withdraw your complaint