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The salon featured two floors of makeovers, with a "nail rave" in the basement with a DJ, neon lights and a smoke machine.

Giffgaff's head of advertising, Abi Pearl-Ward, explained that the salon allows "people to get made up as our wonderful cast" from the brand's four minute Halloween film "2AM".

The film ties in with Giffgaff's overall marketing campaign with the theme of "free to go, free to stay" resonating throughout.

She also said that the salon allowed the brand to "give a little back" to the "millions of people" who have watched the content.