I recently moved addresses and my premium went up by £360.40.
No one has been able to explain exactly why my premium has gone up by this amount, I've only been given vague responses. I was also denied payment deferral, due to the fact that I paid for my car insurance policy in a lump sum.
In conclusion, I am short on money for the next 2 months because moving addresses has meant putting a deposit on my new property, paying two months rent, and paying an extra £360.40 for my car insurance.