I have previously recommended good2go on here, as WorldFirst had been really unhelpful.
However this morning good2go gave me a quote for 2 weeks in Cuba for £762 or £985 for two people (only one with CLL which is in complete remission). the difference was the level of cancellation and baggage cover
I have just come off the phone from another company called Insurancewith (all one word - insurancewith.com). Exactly the same details - £137!!!!!
Their online quotation system asked all the right questions - current status, white cell count, platelet count (well perhaps they should have asked for lymphocyte count rather than white cell count, but I was not going to argue with them). At the end it did say please ring us which was frustrating. There was a 10 minute delay waiting for the phone to be answered but it was well worth it - apparently they have been inundated with calls since it was recommended by one of the tabloid journalists (I refuse to name the newspaper!!).
So, Cuba here we come, and i highly recommend Insurancewith