"The award should help send out the message that sex isn't shameful, and we are playing a vital role in helping people sustain healthy marriages and relationships."
Mr Prescott, 33, who runs the business with his partner, Trish Murray, 35, opened his first shop in his home town of Chester in 2000.
He now owns seven stores, including branches in Liverpool and Southport, which sell DVDs, sex toys, lingerie and specialist outfits. The 4,000 sq ft Warrington store is the third largest adult shop in the world. The business now has two reasons to celebrate after also winning a European trade award last month.
Mr Prescott travelled to Birmingham where he beat the Ann Summers chain to the Retailer of the Year honour at the Erotic Trade Only awards.
He said: "We were so surprised to win this one. This is our industry equivalent of the Oscars." Investors in People assessors make visits to the companies to gain an insight into working conditions.
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