Londoners were seeing double after an impromptu live busking performance by not one, but two Olly Alexanders.The British pop sensation shocked his doppelganger by gate-crashing their gig at St Pancras station, inspiring a spontaneous 30-minute performance which surprised commuters.

The lookalike tribute named ‘Starstruck’, also known as Keith Marshall, normally tours festivals and events throughout the UK. After kicking off what he believed to be a solo busking performance, he made it halfway through the iconic Years & Years hit ‘Desire’ when the real Olly revealed himself on stage to ‘double’ everyone’s fun.

Talking about the impromptu performance, singer and actor, Olly Alexander, said: “Why have one of something when you can have two? It was nice being able to perform with my wonderful doppelganger, Keith.”

“I hope the crowd had as much fun as I did,” he added.

It comes as research of 2,000 adults, commissioned by Twix to launch its new brand platform ‘Two is more than one' revealed two in five Brits are fascinated by doppelgangers, with 78% saying they’d love to meet their own.

The study also found it is Gen Z who would be keenest to have a doppelganger to step in for them most, followed by Millennials (66% vs 51% respectively). According to the study, the younger generation would use them to clean up after them and go to work for them, to sit through boring meetings.

It also emerged 37% have already been mistaken for someone else before, with 53% intrigued by the idea that there is someone in this world that looks just like them.

Interestingly, 24% would use them as their assistant, rather than their equal. Over two thirds would put their doppelganger to work tackling household tasks like the washing up and laundry, while 26% would send theirs to social events they don’t want to go to, while 25% would have them wait in for a delivery for them.

Others would use them to get out of having to make small talk with people they don’t want to talk to, read through long contracts or T&Cs or do the food shopping.

The research, carried out via OnePoll, found 55% believe they don’t have enough time for everything they need or want to do in general. Blaming this on there not being enough hours in the day (48%), taking on too many responsibilities (34%) and unexpected things always coming up (33%).

As a result, if they had a double, 49% think their life would be at least twice as easy, almost half (47%) would get more done if they had a double, while 34% would be much happier and less stressed.

Four in ten also think it would be more fun if they had someone who looks like them temporarily taking their place.

The latest brand platform ‘Two is more than one,’ nods to its classic two bar serving – because Twix aims to give you a good thing twice.

Lauren Godfrey, senior brand manager from Twix said: "In a world where time is precious, having a clone would be the ultimate life hack.

“While we may not have doubles of ourselves just yet, we’re pleased to have doubled the fun for many of the public today. It’s important to make time for little treats amongst the day to day.”