If your a Co Op Privilege or Privilege Premier current account holder then you could be getting £100 off your next car insurance quote from CO OP insurance.
Go through Quidco to get £50 cashback and then when ordering your insurance do the following:
At the bottom of the page, choose "NON-MARKETING" in section what prompted you to apply online and then select "VCTM1-ONLINE" in campaign type.
Another £50 will then be credited to your current account after taking out the policy.
I must add Co Op insurance is very competitive and give lots of benefits that elsewhere you pay for, i.e Free Courtesy Car and Windscreen Repair.
Check the excess on your current policy also, Co Op often quite low.
If you do not currently have an account you can open one within 60 days of taking out the policy and still claim your £50.