I thought it would be pretty straightforward to do this, surely im not the first person to extend their round the world trip! I want to get an extra 3 months travel insurance. However, you cant purchase travel insurance from my irish bank unless you are flying from and reutrning to ireland. Im going to thailand from australia.
i had the same problem - i called my uk insurance company from New Zealand and they wouldn't do it as my trip wasn't starting off from the UK. i think most companies have this policy although it may be worth shopping around. in the end i went with a NZ company - it would have been a hassle if i had had to claim, but possible, and at least i was covered.
If you are outside of the UK and don't have travel insurance I would recommend Trailfinders as they can do this (most can't) you can get them on 0207 938 39 39. Another that appears to be able to do this is www.tia-insurance.com/international
World Nomads are the other company that does this. We are with them, pretty standard benefits and terms of insurance but you can take it out in whatever country you are in.