I recommend Allclear. They are not the cheapest, or the most expensive, but they are known to be reliable when it comes to organising transport for a sick customer and paying out. I was with InsureandGo a few years ago, but it's so cheap compared to many others and there are so many poor reviews about bad experiences of claiming, that I felt uneasy and went back to Allclear. If you get a quote from them, it costs 10% less online than by phone. They offer their own Policies and some from other companies, as they also operate as a broker for others. I think the other companies policies probably account for most of the negative reviews and the glowing reviews are their own (I hope anyway, it's a mine field)!