Queen could be set to release a new song featuring Freddie Mercury on vocals.

The forgotten track - which was recorded more than 30 years ago before frontman Freddie died in 1991 - has been re-discovered by the rock group and features all four of the band members - including Freddie, guitarist Brian May, drummer Roger Taylor and former bassist John Deacon.

Brian, who has just been given the all-clear from cancer, spoke about his relief and thanked fans for their support on his Soapbox blog before revealing details of the new track.

On Monday (13.01.14), he wrote: ''I had a great day in the studio today anyway, even before the welcome news. And some Queen magic is happening ... I can feel it in my bones. It's annoying to have to be so secretive, but I guess I have to, for now.

''What I can say is the track we dusted off has the four of us -- Freddie, John, Roger and myself -- playing together on a track we'd all forgotten about.

''It sounds so fresh. I got quite emotional hearing some of it ... some rough takes, some discussion and banter, and then a really good take, and some overdubs, and ... well, it's crying out to be finally brought into the world. (sic)''

He added: ''I can't help but feel a buzz. I'm energised again.''

A few months ago, Roger Taylor revealed Freddie had duetted with Michael Jackson and the undiscovered tracks are also being worked on by Brian.

The guitarist is celebrating after doctors gave him the all-clear following a prostate cancer scare last month.

He wrote: ''I got a great phone call from my specialist. He said, 'I have good news. The result of your prostate biopsy is here and we did not find any cancer cells.'

''So finally, as far as that vital organ is concerned, I am -- thank God -- in the clear. There are still some mysteries to solve, but I am going to take a moment to count my blessings.''