Thanks ,I used the link and had a look and the only ones that I would trust to use would be like the AA or some other known name as I would be too worried to use a name I had not heard of before especially when I am taking the 2 kids with us.
Obviously the final choice would have to be yours so as you have peace of mind, however the companies listed such as Columbus Direct at £13.30 are very well known insurance companies.
The AA via Moneysupermarket is £28.81 just for your info as that is cheaper than where ever you got your quote of £38.00.
I would still recommend that if you don't get free insurance to shop around as there are good companies out there selling insurance without making the huge mark up of some companies.