How much does it cost an insurance company to hold a car in storage per day in the UK?

my car has been held in storage since the 12th of march due to an accident which was'nt my fault,i have since cancelled my claim,but before my car is released back to me i will have to pay a fee for its storage and return to my property,and i was wondering how much it costs per day for storage,as the insurance company have failed to give me any prices. thanks for reading this.