The phone rings, and our interviewee breaks off to check the number.
He doesn't answer it: "I keep getting random calls all the time," he says, "It's every few minutes..."
He shrugs his shoulders and carries on with our chat.
Unwanted phone calls are something that Bailey McConnell has just had to get used to.
A year ago, he was a teenager dreaming of success as a singer-songwriter - a familiar teen fantasy. Except that Bailey isn't your typical youngster.
He took his self-penned tunes before an audience of millions on last year's season of Britain's Got Talent, and the madness began.
"It's crazy to think that last Valentine's Day I was going on the show and only had a small following. It has grown ridiculously since then. It's quite shock that we've managed to sustain things, despite me going out in the semi-final.
"I can't comprehend it..."
"It's because you're a babe," offers Mark Goff, who will be fleshing out Bailey's live sound on his current tour. Laughter ensues.
There are a lot of smiles in this rehearsal space, and an easy atmosphere that belies the hard work that has been happening in recent weeks.
While you are reading this, Bailey is out on the road enjoying his first UK tour.
He stills suffers with nerves he tells me, recalling his first time in the spotlight at that Britain's Got Talent audition.
Can you remember how you felt walking onto that stage for the first time?
"Because I had watched the show that many times before, it didn't feel real. Sometimes I think it still hasn't sunk in. It's unexplainable," he says, before coming up with a parallel: "The only way I can compare it is when you are on a scary ride for the first time. When the harnesses come down and you get that rush, that feeling...I still get that now, every time I set foot on the stage."
He might look to artists like Ben Howard and Ed Sheeran for inspiration, but this talented 15 year-old - he is still a few weeks away from his sweet sixteenth - has his own talent pool.
He writes his own material, and as he demonstrates for me in his rehearsal room with a live rendition, he knows how to knock out a song.
"I'm finding it hard to write at the moment though," Bailey admits, "...because everything is good. I don't wish for a bad life, but when you've got bad things happening it fuels you...
"The newest song I have written, called Crystallise, isn't about me in particular. It's about a friend who was going through a really hard time and they got to the point where they'd had enough, and thought 'I can't do this anymore.' "It's a very, very deep song and I immerse myself in it every time..."
He'll play it on the tour, accompanied by Mark (above), who some of you will know from his role in three part harmony aces The Shures: "Bailey wanted to bring a different sound to what he was doing and I'm bringing in a new element," he said, explaining his role.
"When you are doing something on the scale that Bailey is, it's good to have a new sound, something different. I think this tour will give him a burst as a musician, and push him along too..."
Bailey: "I've been gigging for a couple of years which doesn't sound like much, but it feels like ages. Doing it on your own with a guitar can be quite frustrating.
"When you have someone on stage who is able to play different instruments - like Mark - it opens a whole new playing field. That's what we want to get over on the tour - a new sound."
We've already alluded to the fiercely supportive fan base that follow Bailey's every move, and he doesn't take their support for granted.
It's mind blowing how many followers he has on social media for starters - like the 107,000 Twitter followers hanging onto his every tweet.
"My fans are amazing," he says with a big grin. Not to mention generous.
"My room at home is full of so much stuff. You couldn't get another person in the room with the amount of stuff, there's just so much of it.
"We have this cupboard too, we call it the sweet cupboard now, and it's full of confectionary. There's about seven hundred pounds worth of Mars bars as well.
And if Bailey fancies taking an altogether different approach to his work, he could go the way of Tom Jones - he's already getting underwear thrown on stage when he plays!
Occasionally though, things are harder to deal with: "Sometimes I get in-boxed by fans who say 'If you don't message me, I'm going to do something silly,' he says with a pause, "That can be quite hard to see.
"My mum tells me not to let that stuff fester, and not to let it bother me, but it is quite hard to deal with.
"From my point of view it is quite humbling that people are confiding in him," manager Dom says,
"He does write his own songs, a lot of them are quite deep for a 15 year old, and people can relate to them. Potentially, listening to his songs and lyrics might have helped people out of their own situations..."
"And that's a massive, massive achievement for me," Bailey continues, "For someone to say 'Your music has touched me.'
"That's the only thing I want really - to have people understand my music.
"I usually write about personal experiences, because that's what I find easiest to write about, and it's true then - not made up."
Most 15-year-olds take a trip into town for granted, but these days Bailey can't pop to our shopping centre on his own.
He recounts a story last year when he was spotted and followed en masse to the barbers.
While his mop was chopped, 200 fans waited for him to re-merge from the store and security were called.
"I ended up being put in a maintenance room until the majority of people cleaned out and went back to WHSmith..."
'WHSmith?' you ask.
They had been queueing at the bookstore to meet TOWIE chap Joey Essex before Bailey's appearance turned their heads!
Then there was the gig in a Peterborough shopping centre: "It was the first proper gig I had done outside of Milton Keynes and we were hoping for 50 people...1000 turned up!"
Our star in the making might have come to attentions with that Simon Cowell approved appearance on Britain's Got Talent, but now it's time to wipe the slate clean, and move on.
After all, Bailey has - there are some exciting tour opportunities ahead, and the small matter of a debut album to consider.
There's a deal on the table and the songs ready to be recorded.
Brand Bailey - much to the delight of that fervent fan base - is here to stay.
Sammy Jones
