http://www.autoexpress.co.uk/car-news/65567/best-car-insurance-companies-2013
I'll add my own experiences with swiftcover through and beyond this period start 2013 - start 2015
It was initially very difficult to contact them if you had doubts or problems with 'self management' at the start, but by the end of my time with them, the email contact had improved massively and the responses were good rather than just a response referring you to the premium rate number as it was at the start.
The self management online changing of features/cars was effective and penalty/charge free and gave no shocking increases in charges as a result, and in one of the cases resulted in a reduced premium with the difference speedily paid back into my account.
I did not need to make any claim, so cannot comment on that side of their service.
I left due to increases in basic renewal premiums/cost, parhaps due to the increased cost in customer service.
No issues at all with leaving. and the 17 years NC was on the renewal offer and confirmation available for download from myspace on swiftcover.
They also apparently confirm to other companies on request - per Hastings Direct.