Looking for short term car insurance?

I'm heading home to UK for a month in July, to visit family and friends and, rather than rent a car I'm thinking of buying a cheap, used car - something like an 10-15 year old Ford Fiesta - and then selling it again just before I leave.
I've tried searching for temporary insurance but most results seem to offer insurance linked to an existing policy holder and I'm not sure that what they offer actually would apply to my proposal. I live and work in the Far East, so I don't have any need for permanent/long-term insurance in the UK.
Any suggestions, people?

If you are only going to be there a month, then it's probably cheaper to rent a car for the month than to buy a car, get short-term insurance, and sell the car.

At least in North America, if you cancel car insurance before it expires, you get a refund of the unused portion.

@StephenWeinstein I disagree - Rental for 1 month: around £550-600 for a small/medium car. No financial return.
Used Ford Fiesta (c2005-07) £600-750 from trade dealer (thus very likely to include valid MOT and road tax). If I can get temporary insurance, that would probably add no more than £50-100. Total cost c£650-850

Re-sale of car would return £550-700. Final cost to me would be about £100-150.

I read your reply to stephen… He is 100% right. Your out of touch with reality. You haven't a clue about insurance companies today… If your living and working in far east your not skint .yet trying to save maybe £100!at least if the hire car breaks down you won't have to pay for repairs… Wise up.

Nobody sells short term car insurance, not in the UK or anywhere else (except Mexico, but don't ask). There's no money in it, and insurance companies are in it for the money. That's why you haven't found any information on it, because it's not available.

If you buy a vehicle and sell it a month later (which is perfectly legal), your only option is to set up a six or twelve-month insurance contract and then cancel it when you sell the vehicle. There will be a cancellation fee, but you are allowed to cancel the contract in writing at any time.

NOTE: They won't call it a cancellation fee, they'll call it a short-rate cancellation, but it's a cancellation fee. I have no idea how much extra it costs in the UK, but it's not as bad as cancelling a gym membership or cell phone contract.

There's no such thing as short term auto. Insurance. Buy a normal policy, then cancel it when you no longer want/need it.

I would rent a hire car if you buy a car you will have to tax it.

No such thing. You buy it for 6 months at a time. Cancel when you want and they will send a pro-rata refund.