Professional wrestler “p*ssy Willow” pictured with client Wilfred during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. Hidden behind hundreds of unassuming terraced houses in north London is a wrestling gym with a difference. Within the confines of the padded vivid-red mat room of The Submission Room, in north London, men pay to be grappled to the ground, sat on, twisted, bruised and even knocked unconscious. And owner and wrestler, Pippa the Ripper says business is good. (Photo by Susannah Ireland/Barcroft Images)





Professional wrestler “p*ssy Willow” overpowers client Wilfred during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Amethyst Hammerfist” warms up her muscles ahead of her BDSM wrestling session with client Wilfred at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Pippa The Ripper” holds client Steve “Monkey Boy” in a head scissors hold during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Pippa The Ripper” overpowers client Steve “Monkey Boy” during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Pippa The Ripper” overpowers client Steve “Monkey Boy” during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Pippa The Ripper” overpowers client Steve “Monkey Boy” during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrestlers “Pippa the Ripper” (left), “p*ssy Willow” (centre) and “Amethyst Hammerfist” (right) at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrestler “p*ssy Willow” overpowers client Wilfred during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Amethyst Hammerfist” overpowers client Wilfred during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Pippa The Ripper” overpowers client Steve “Monkey Boy” during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Pippa The Ripper” holds client Steve “Monkey Boy” in a camel clutch hold during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)





Professional wrester “Amethyst Hammerfist” holds client Wilfred in a body scissors hold during their BDSM wrestling session at The Submission Room session wrestling and BDSM gym in Seven Sisters, on December 12, 2016 in London, England. (Photo by Susannah Ireland/Barcroft Images)