The mum of a man who was stabbed to death in a bar has appealed to find her son's killer on the third anniversary of his murder.

Josh Hanson, 21, was fatally stabbed in Hillington, west London, on October 11, 2015 and the chief suspect is Shane O’Brien.

The 29-year-old tops the National Crime Agency’s most wanted list after fleeing the country via Biggin Hill Airport following the unprovoked attack.

He is believed to have boarded a privately charted flight.

Tracey Hansen, Josh's mum, has been handing out leaflets at Victoria station advertising a £50,000 reward for information that leads to O’Brien’s arrest.

She said: “No-one wants to see a sandwich board with 'murder' on their morning commute but it's the reality of my life. I'm desperate, something needs to be done.

"I wish the story of my life was different and that it was Josh walking out of that station. The moment I received that phone call, my life stopped.

"The public have been absolutely unbelievable, if it wasn't for their support ... We've had posters in Australia, Thailand, Cambodia, all over Europe. It's the public that we need.”

O’Brien was arrested in Prague over criminal damage and assault in February last year under the Italian alias Enzo Mellonceli. He was bailed pending further enquiries.

An image showed O’Brien had grown his hair, wore a full beard and had a large tattoo of an owl holding a skull on his back.

Detective Chief Inspector Noel McHugh encouraged people to keep sharing his picture and added that he believes a small group of people are helping the suspect with cash.

He said: “This family have been ripped apart by what happened.”

Anyone with information can call Crimestoppers on 0800 555 111.