Hi, i work for UKI, we underwrite Tesco car insurance. let me explain....
The reason the premiums are different on the comparison site is quite simple. We will pay gocompare.com or confused.com a referral fee for every customer we get through their website. the reason we use them? Brand power. their advertising budget means our brand reaches far more people than our own attempts.
lets say you get a quote on gocompare & it's £400 & we pay them a referral fee of £50. Whislt it searches the insurers for the best price, gocompare will also be searching confised, moneysupermarket....all of them.
Now, if they have a premium which is £400 with a £50 ref fee & confused offers it for £380, gocompare will reduce the prem by £30 to beat them & only pocket a £20 referral fee. Sometimes, being the most popular compare site is half the battle won so they are prepared to take a hit on their own profit.
Now, for your policy which we have got through go compare, we've already lost £50, we are not gonna chuck in a pressure washer as well. That's why it's only ever available through tesco.com. i appreciate that you might feel a little aggreived, but after dealing with policy holders for 2 years, its' quite clear that people DO NOT read the terms & conditions at all.