Royal Mail Special Delivery is a mail service from Royal Mail in the United Kingdom. It insures goods between the value of £500 and £2,500. The sent item will reach its destination by 1pm or 9am the next day for an increased cost. In the event that the item does not arrive on time there is a money back guarantee.
There are specific areas of the UK where later guarantees apply - these can be seen on the Royal Mail website. Quality of service for Special Delivery is very high at around 99%, and has been consistently at or about this level for a number of years. It's used by a number of major businesses, as well as consumers and smaller businesses, and can be purchased through a postage account, a postage meter, or from Post Office counters.
On receiving the item, the recipient must sign for it. If the recipient is not in, then a P739 'While you were out' card should be left by the post delivery person.