Would anyone be able to recommend a company who offers annual travel insurance for someone aged 70 who has had skin cancer. Any claims made would probably NOT be due to the cancer. Companies seem to offer single trip insurance, but it's expensive. Obvious companies such as SAGA didn't offer annual policies.
try googling "travel insurance", you'll get lots of results. Have a look at the various policies they offer - I ended up with primary, but it depends very much on individual circumstances.