cheap car insurance temporary

Can anyone recommend a company cheap car insurance for temporary (UK)?
ensured sufficient for a few days by his word?
http://www.dayinsure.com is the only short-term insurance, to my knowledge. You can get insurance for 28 days. You must be at least 21 years to buy a minimum coverage or 25 higher insurance groups. His only other option is to ensure a long and then cancel and get a month to cover unused.
No matter what exactly are we planning to buy, all of us have a tendency to discover the cheapest possible solution for our requirements. So, the very same applies to purchase Automobile Insurance.