A clubber who shot dead a former British boxing champion when he asked a group of men to stop smoking at the bar has been sentenced to 28 years in jail.

Kanyanta Mulenga, 23, blasted 6ft 9in gentle giant James Oyebola in the back of the neck using a gun he smuggled past security guards.

He was sentenced to 28 years in jail by Judge Peter Rook QC at the Old Bailey today.

Mr Oyebola, of Mulgrave Road, Dollis Hill, never regained consciousness and died four days after the shooting in hospital from brain damage.

Mulenga reacted furiously when the boxer, who was friends with the owners of Chateau 6 in Fulham, asked his friends to stub out their cigarettes in the garden.

The shooting happened three weeks after the nationwide ban on smoking in pubs and clubs had come into force.

During his career Mr Oyebola won a Commonwealth Games bronze medal in Edinburgh in 1986 after losing to Lennox Lewis in the semi-finals.

His brother Kelly and wife Malin Oyebola were both seated at the back of the hushed courtroom as the verdicts were given.

Two other men, Rene McKoy, 20, and Dean Francis, 24, were cleared part way through the five-week trial after agreeing to give evidence for the prosecution against their friend.

Francis said Mulenga, who denied murder, showed him the gun minutes after the shooting on July 23 last year when the pair got a bus home. McKoy told jurors he saw Mulenga, of Tildesley Road, Putney, fire a shot inside the bar.

CCTV cameras showed the gunman tucking the weapon into his waistband before casually walking out of the club after firing three shots. Mckoy, of Marmion Road, Battersea, and Francis, of Royal Orchard Close, Southfields, were cleared on the direction of the judge.

A fourth man, who cannot be named for legal reasons, will be tried on a date to be set.