Tributes have been paid to the promoter of shanty group Fisherman's Friends, who died after he was trapped under a metal door, hours before the group were due to perform.

Paul McMullen, the band's promoter, from Disley, died at the scene with leg injuries after he was trapped underneath a metal stage door at the G Live venue in Guildford on Saturday.

A spokesman for the group Said The Maiden, who had worked with the singers, said: "Paul was an amazing man, who gave us a fabulous opportunity to sing for the Fisherman's Friends.

"We feel honoured and grateful to have been able to work with him. Our thoughts and prayers are with his family and the guys."

Singer Trevor Grills died from his injuries on Monday night having been seriously injured in Saturday's incident. Mr Grills suffered severe head injuries in the incident and was taken to hospital in London, where he later died.

Speaking from the band's fishing village of Port Isaac today, bass singer Jon Cleave said in a statement: "This is an announcement that we really wish we didn't have to make. It is with great sorrow that we have to tell you that Trevor Grills - husband of Leslie and dad to Paul, Mark and Josh, lifetime friend and Fisherman's Friend - died of his injuries last night in St George's Hospital, Tooting.

"Our deepest love and thoughts are with Trevor's family and we would like to sincerely thank everyone for your messages of love and support.

"We know that Trevor, who was a proud yet modest Cornishman, would be quite overwhelmed by it all."

Mr Grills, who at 54 was among the younger members of the vocal harmony ensemble, often took the lead on the Friends' more melancholic pieces.

He was described by his band members as "a much-loved and valued friend to all of us... an integral part of the Port Isaac community".

Writing on the group's Facebook page, Sarah Lee said: "Words seem pointless, but apart from sending you all love there's not much else we can offer."

Fellow fan Charlie Mason added: "Such sad news - we saw you all in Cheltenham on Thursday, and loved it - Trevor bought joy to people - a gift few of us have. We've lost someone special."

The band have enjoyed commercial success since being discovered singing on the quayside in Port Isaac - a tradition they have continued.

The Friends, who reached the top 10 in the UK charts in 2010, played to an audience of thousands at Glastonbury's iconic pyramid stage in 2011, as well as advertising seafood on television commercials.

But fans have already begun to ponder what the tragic news will mean for the future of the Friends.

Writing on the group's Facebook page, Ellen Rodgers said: "Being Cornish and knowing how tight a community Port Isaac is, I know the whole village must be in shock, but please please keep singing even louder now for Paul and Trevor. I am sure they would have wanted that."

Asked about the Fisherman's Friends' future, a group spokesman said: "It's probably a thought that has not occurred to them yet."

The scene of the tragedy - the loading bay area - is out of bounds while investigations continue, although G Live remains open.

Some fans have claimed failures at the venue could have been responsible for the two deaths.

But a spokesman for G Live dismissed the suggestions, saying it "would not operate if that was the case".

Venue director Alvin Hargreaves said: "We are devastated to hear that Fisherman's Friends band member Trevor Grills died in hospital last night as a result of the head injuries suffered on Saturday.

"Surrey Police and the Health and Safety Executive investigations are ongoing with no further information being available at this time.

"Guildford Borough Council and HQ Theatres, who own and manage the venue respectively, continue to fully assist with the investigation."

An HSE spokesman said it was unable to comment further while its investigation was in progress.