The official website of the Prime Minister of the United Kingdom (that's Gordon Brown, for those not scoring at home), Number10.gov.uk, there is a section about the history of the office and it includes a section on stats (linked above).
Some of the stats are ones that you would expect:
Youngest prime minister: Willam Pitt (aka the Younger) - age 24
Shortest term: George Canning - 111 days
Longest service in Parliament: Winston Churchill, a week short of 64 years
Then you get to the fun stuff:
"Took part in duels" - There were four and William Pitt makes another appearance
"Interested in horse racing" - There are five, including Churchill.
"Bushy side whiskers" - There were three. And the list includes Lord Palmerston. But not Margaret Thatcher.