A member of the group I'm travelling with in September has been refused travel insurance by a few companies based on her recent operation so I would be extremely grateful if you could give me some more information - I will go into whsmiths lunchtime to try and get a copy of which to read the report myself.
Which? only made enquiries for a small selection of existing medical conditions, si it would be wise to check with the above for the condition that your travel companion suffers.