Memorabilia of comedian and actor Peter Sellers, including his Golden Globe award, is to go under the hammer in Devizes for around £9,000 days before the 30th anniversary of his death.

The last document ever to be signed by Sellers on the day of his heart attack, July 22 1980, is also up for sale at the auction on July 17.

His fourth wife Lynne Frederick inherited his estate, worth an estimated GBP4.5 million, despite the fact that he was reportedly in the process of excluding her from his will.

His three children Michael, Sarah and Victoria received just £800 each.

The document for sale, signed at London's Dorchester Hotel, was never filed but would have given Victoria £20,000.

Sellers collapsed in his hotel room on July 22 and fell into a coma, from which he never recovered. The star died at 12.26am on July 24 in a London hospital, aged 54.

Andrew Aldridge, of Henry Aldridge and Son, which is handling the sale, said: "His daughter Victoria was left just £800 in Peter's will and if this trust fund had been known about then she would have been left a very large amount on her 21st birthday.

"Victoria's life took a downward spiral after Peter's death."

This trust document, dated July 22 1980, is expected to fetch up to £2,000 when it goes under the hammer.

Mr Aldridge said: "She would have received £20,000 if this had gone through, which in 1980 was a considerable amount of money compared to £800."

The agreement between Peter Sellers, "the Grantor", and Elwood Rickles and Michael Wolf, "Trustees", for £20,000, reads: "The Trustees shall hold, manage, invest, reinvest the trust property for the benefit of Victoria Sellers, daughter of the Grantor, born January 20, 1965 upon the following terms."

It lists several provisions about the disposition of the funds, a spendthrift provision, the trustee powers and various other terms and conditions.

"When Victoria Sellers attains the age of 21 years, this trust shall terminate, and the entire trust estate consisting of the principal but not the income of the trust, shall be paid and distributed to her, free and discharged of all trusts," it reads.

The final page bears the signatures of Peter Sellers, Elwood Rickles and Michael Wolf as well as three witnesses.

Other documents being auctioned include Sellers' last ever employment contract, covering the films Being There, The Prisoner Of Zenda and The Fiendish Plot Of Dr Fu Manchu. It is expected to fetch up to £800.

His Golden Globe Award for Best Motion Picture Actor in a Comedy or Musical for his role in Being There in 1979 is expected to fetch up to £6,000.

The award was issued by the Hollywood Foreign Press Association on January 26 1980 in Los Angeles and was the only Golden Globe Sellers ever won.

His performance in the same comedy, directed by Hal Ashby and starred Shirley Maclaine, also earned him an Oscar nomination.

A reunion dinner was scheduled in London with his Goon Show partners, Spike Milligan and Harry Secombe, for late July 1980.

At the time of his death, Sellers was scheduled to undergo heart surgery in Los Angeles within a month.