The secret phone bid was made at an auction of plates held by the DVLA at Towcester, Northants. Despite the credit crunch, motorists forked out £3million in three days of bidding.
Other buyers included Spencer Gay, 38, of Surrey, who paid £94,000 for “3S”. On Thursday a businessman shelled out £113,815 for “1 HRH”.
The number plate 1 HRH is expected to sell for a record amount at an auction this week.
DVLA bosses are confident the plate will fetch more than the current record of £254,000, paid last year for 51 NGH.
In a private sale, the plate 4 HRH is being offered for £250,000, but Damian Lawson, DVLA’s personalised registrations’ marketing manager, said he expected
1 HRH to command an even higher price.
He said it was likely to go to a bidder from an Arab royal family.
‘There has been a lot of interest but people tend to keep their powder dry,’ he said.
More than 1,600 plates are up for sale at the three-day auction at Whittlebury Hall, near Towcester, Northamptonshire, which begins on January 28.
The registration 1 O has been given a reserve of £10,000. ‘For the connoisseur,
1 O is one of rarest available,’ said Mr Lawson.
The DVLA has raised £68million since April by auctioning off previously unissued numbers.