I contacted my insurer (life and critical illness cover) when diagnosed last year as I was concerned that if anything happened to me, and they later refused a claim because of me not disclosing my diabetes, then my partner would be left in the lurch. They told me that as long as I had no symptoms before taking out the policy (which I did not), then there would be no problem with continuing with the policy. I did however ask them to confirm that in writing - I am very wary of accepting things that people in a callcentre tell you over the phone. At least with written confirmation I have some sort of back up if they change their minds later. They have put my premiums up (which seems a bit suspicious coming so soon after the diabetes diagnosis), but that has been attributed to the general increase in the price of everything.
Having read some of the threads in the employment forum, am now wondering whether I should have contacted the company that I have my unemployment insurance policy with as well. Didn't seem necessary at the time, but am not so sure now......
Vicky