As popularity grows, the prices reached for the most expensive plates are always increasing. As of 2008, the record price for a number plate is £397,500 paid at auction in September by an anonymous buyer for the plate S 1. This was originally owned by Sir John H A MacDonald, the Lord Kingsburgh and was Edinburgh's first ever number plate. Car design entrepreneur Afzal Kahn paid £375,000 on 25 January 2008 for F 1 previously owned and sold by Essex County Council and affixed originally in 1904 to the Panhard et Levassor of the then County Surveyor. £330,000 was spent on M 1, sold at auction in Goodwood on 7 June 2006.

The UK’s most expensive number plate to date is the F1 registration number purchased by a British businessman for £440,625 in 2008, though that’s just small change compared to the £7m spent by Abu Dhabi-based Saeed Khouri on the 1 number plate – officially the largest sum of money ever spent on a registration number.

Even in the early days, people recognised the significance and enjoyment brought by owning a prestigious or personalised number plate and often kept them within the family for many years. Their significance is often highly personalised to their owners. Some like to have a registration that originated in their local area, some are attracted to owning their own initials and others enjoy the fun of a word based registration mark.

Since the dvla introduced the bsau145d legislation it has been increasingly difficult for motorists to obtain number plates with anything other than legal spacing.

There is however another line of argument for the defence of the serial mis spacer. They say that a number plate that has been altered to make a word or a name is much more memorable in the event of an incident.
They also argue that the dvla blatantly auction registration numbers that would be virtually worthless without mis spacing.

The number plate 1D was bought for a record £352,000 at auction yesterday.

Tycoon Nabil Bishara won it in fierce bidding and plans to put it on his wife’s Bentley.

His £352,411 offer beats the previous £254,000 best for a DVLA sale, set by 51NGH in 2006. The DVLA’s Damian Lawson said after the auction in Claverdon, Warks: “We’re absolutely over the moon.”

Britain’s priciest car reg is F1, bought privately for £440,625 in 2008 by Afzal Kahn of Bradford, West Yorks.