They are better known for whistling while they work. But it is the dulcet tones of a scaffolder which are stopping passers-by in their tracks in King's Lynn.
And now the owner of the silky voice which is captivating pedestrians as they pass St Nicholas' Chapel can be revealed.
For behind the temporary construction units and metal poles is scaffolder Adam Watson, who belts out classic hits as he works high above the street.
People often stop what they are doing to listen to the talented 32-year-old scaffolder from Lynn to sing out hits by artists such as Queen, Michael Jackson and Robbie Williams.
Mr Watson said people will often come over towards the site and shout over for a request.
He said: 'I have been asked to sing a Pavarotti song but the weirdest request is probably Su-bo (Britain's Got Talent's Susan Boyle).
'I have sung all my life. The songs just come out of nowhere. I sing a lot of Michael Jackson's older stuff like The Way You Make Me Feel.
'I Want To Break Free by Queen is a favourite. It makes the day go quicker and helps team morale as everyone is happy.'
But although his voice is loud and strong, Mr Watson is surprisingly shy.
He does not like to sing on the spot in front of an audience and said he 'Goes red if anyone asks me to do it.'
His eight-year-old daughter Shyler, who likes to him sing, as well as his partner, Toni Hunting.
'She says she like to hear me sing but probably would like me to shut up most of the time,' Mr Watson joked.
Born and bred in Lynn, Mr Watson attended St Edmunds Community Foundation School and Gaywood Park (now known as King's Lynn Academy).
Mr Watson works for Rise Scaffold Services Ltd, which is based in the town.
The company have been providing a scaffolding service as part of a £2.7 renovation scheme on the chapel.
So far the team have been at the site for around a month.
Colleague Rikky Toll, 32, said: 'Only this morning a member of the public came over and said he should be a singer not a scaffolder.
'I like his singing, he is really good. Loads of people are always coming up and putting in a request.
'But he is really shy - I ask him to do karaoke with me and he won't as he is too nervous.'
Site manager Nicky Brayshaw, agreed: 'He makes everyone happy on site so it's good. I think he is a good singer.'
The project will see the 600-year-old church have a community centre and concert hall.
The roof of the church is being replaced and solar panels will be installed on flat roof spaces.
Work inside the building includes new toilets, a kitchen and an open area for indoor markets and performances.
The refurbishment, which is expected to take until May 2015.
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