Hi
Budget, Auto Trader, Yes Insurance , HSBC and Post office branded Insurances are administered by BISL Ltd ( Budget Insurance) based in Peterborough. I did have a post office policy and had no problems with service, documents received ok. I have read other comments advising that Renewal Documents have not been received and policies have been automatially renewed. However, I certainly received all my documents in a timely fashion. I didn't sign up for automatic renewal !!! Do a search on forum for Budget Car Insurance and see what others say.
I have never used Swinton so I don't know what policies they offer or what there service is like. Do a search for Swinton on this forum. There are some critical posts.
Check the admin/amendment charges that you may incur if you made any changes to the policies mid-term. Also check policy wordings, particularly how excesses are applied.
As another poster to this site says, cheap is cheaper for a reason !!
Over the years I have personally found Direct Line and AA to be the best. Others may have different opinions. I have heard many positive comments about Insurance through Direct Line, NatWest, RBS and Tesco. These policies are underwritten within the RBS Insurance umbrella.
Huckster