I was sent a renewall last year, did one of those comparison sites and the cheapest was my own insurance company but £150 less.
So I call them and all they would offer was a £50 discount, not the £150 lower price I was quoted.
So I declined to renew.
And then signed up again as a new customer with exactly the same details.
Paperwork all arrived, identical from the last lot with the exception of start and end dates.
Madness.