Assuming UK pounds, at 5am GMT April 5, 2008 and according to xe.com, it's worth $498,579.05
As of 1/29/11, 250,000 pounds equates to $396,510.71 US.
It is 161,950 British Pounds and 00708 British Penny.
Currency exchange values fluctuate daily. See the link below for the latest exchange rates.
$390
go to XE.com there you will find all the answers you need for converting currencies