New figures show William Hague remains the highest-earning MP.

The latest register of MPs' interests published this week showed the shadow foreign secretary made up to £800,000 on top of his £60,000 parliamentary salary last year.

The former Conservative leader made money from directorships, speaking fees, a News of the World column, biographies and television appearances, but has actually cut down on his outside interests since returning to the Tory front bench in 2005.

In contrast shadow higher education spokesman Boris Johnson has increased his earnings.

The Conservative MP earned up to £405,000 last year through his newspaper column (for which he was paid up to £250,000 by the Daily Telegraph), other writing, television appearances and speeches.

The highest-earning Labour MP was former home secretary David Blunkett, who declared as much as £585,000 in payments.

He earned up to £385,000 from his book about his time in the cabinet, including serialisation fees and a promotional television programme, as well as being paid up to £150,000 by the Sun newspaper for his weekly column.

Another former home secretary, Charles Clarke, declared a consultancy with the Beachcroft commercial law firm, worth between £25,001 and £30,000 per year.

After Hague, Blunkett and Johnson, Tory MP Ann Widdecombe and Respect's George Galloway were the next biggest earners, with total payments of up to £310,000 and £309,000 respectively.

Among the party leaders Tony Blair declared his wife Cherie's royalties from her book about life in Number 10, flights provided by the King of Jordan and the use of villas provided by Sir Cliff Richard in Barbados and Bee Gee Robin Gibb in Florida.

He also reported rental income from his two flats in Bristol and home in London.

Conservative leader David Cameron included hospitality provided by Sun editor Rebekah Wade at David and Victoria Beckham's pre-World Cup party in his declaration, as well as revealing that in January this year he took a return flight from Oxford to Shobdon, near Hereford, a distance of just 93 miles.

Liberal Democrat leader Sir Menzies Campbell declared that he has a contract worth £35,001 to £40,000 to write an autobiography for Hodder and Stoughton.

Chancellor Gordon Brown again declared no outside interests.