Artworks by notorious violent prisoner Charles Bronson are to be sold to pay for a holiday for his mother after she was upset by his recent attack on prison guards, an auction house has said.

Bronson requested the eight pieces be sold after what was reported to be an attack on 12 guards at HMP Woodhill in Milton Keynes, JP Humbert Auctioneers said.

It was claimed that furious Tottenham Hotspur fan Bronson went on the rampage in May while smeared with butter after arch-rivals Arsenal won the FA Cup.

The artworks belonged to Ronnie Kray, and are among 150 lots from the estate of the renowned East End gangster, who died in 1995, that are being sold by his second wife Kate.

Auctioneer Jonathan Humbert said: "Charles Bronson recently had a 'rumble' with 12 prison guards.

In a letter to Kate Kray, he states remorse at upsetting his mother and, accordingly, asked if some of his artwork could be included in the sale so as to generate funds to send his mother on holiday.

"The intimate and personal nature of these never before seen Kray items and Bronson paintings show a real human side to these larger than life personalities and, though they are bound to polarise opinions, the lots, much like the individuals, are far from dull."

Bronson, 61, whose real name is Michael Peterson, is currently serving a life term at Woodhill.

He has earned public notoriety with a history of violence both inside and outside jail.