Labour grandee Roy Hattersley, whose dog Buster killed one of the Queen's geese in St James's Park, left £25,000 to the Dogs Trust in his will.
The party's former deputy leader, who died aged 93 at his Peak District home in June, left an estate worth £586,018 after a 33-year Commons career and having written more than 20 books.
His will published this week sets aside a further £25,000 for charities that feed the hungry, with his trustees told to pick which ones and to bear in mind any wishes he left behind.
The bulk of the fortune goes to his second wife Maggie, his former literary agent, who also inherits his literary estate – every published and unpublished work, manuscript, letter and copyright he left.
Lord Hattersley also made gifts totalling £105,000 to four friends, meaning that after the legacies the remaining £431,018 passes to his widow.
He signed the will in June 2024, two years before his death, naming his wife as executor of his writing alone and leaving the rest of the estate to his Sheffield solicitors to administer.
The Dogs Trust legacy evokes memories of his beloved mongrel dog Buster who found fame after a walk in April 1996 that ended with a dead goose and a police officer noting blood around the pet's muzzle.
Lord Hattersley pleaded guilty by letter to letting the dog off the lead in a Royal Park and was fined £75, then turned the episode into a book called Buster's Diaries – written in the dog's voice and casting the attack as self-defence.
Labour grandee Lord Hattersley, who died aged 93 in June, is seen with his dog Buster in 1998
The late politician, seen with Buster in 1999, has now left £25,000 to the Dogs Trust in his will
The former Birmingham Sparkbrook MP served as deputy to Labour leader Neil Kinnock
The politician was born in Sheffield in 1932, the son of a former Catholic priest and a mother who became the city's Lord Mayor.
Lord Hattersley, who was a respected Daily Mail columnist, held several ministerial positions during Harold Wilson's time as prime minister, including employment minister and deputy defence minister during the 1960s.
From 1974 to 1976, he was appointed by Mr Wilson as minister of state for foreign and commonwealth affairs. The following year he held the position of privy councillor.
And between the years of 1976 and 1979, he served as secretary for prices and consumer protection in James Callaghan's cabinet.
Lord Hattersley lost the 1983 leadership contest to Neil Kinnock but was elected his deputy, and the pair spent nine years dragging Labour back from unilateral nuclear disarmament and hostility to Europe while driving out Militant.
Known as Labour's 'nearly man', he was immortalised by Spitting Image as a spluttering puppet.
He served as Birmingham Sparkbrook MP from 1964 to 1997 then became Baron Hattersley of Sparkbrook, before retiring from the Lords in 2017.
Sir Keir Starmer led the tributes after his death, posting on X: 'Roy Hattersley was a giant of the Labour movement.
'Through decades of service, including as deputy leader and a minister, he never lost his belief in a more equal Britain. My thoughts are with his wife Maggie and his family.'
Lord Kinnock said: 'I am deeply saddened to hear that Roy has died and send my profound sympathy to Maggie.
'Roy was a socialist of deep conviction, a dedicated democrat who believed that liberty should be unqualified.
'He was never solemn nor deferential and his common sense, humour and endless stories made him excellent company. All of this made him a valued comrade and an incomparable asset to the Labour Party.'
Lord Hattersley married his first wife Molly in 1956, with the pair divorcing in 2013 before he wed Maggie Pearlstine that same year.
His estate was valued at a gross £594,696, reduced to £586,018 once debts and expenses were paid.