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Jaimie Treharne, from Ammanford, said so-called 'bogof' offers were one of the main reasons she put on weight.

It is dubbed “buy-one-get-one-free”, or BOGOF, policing; local authorities, business improvement districts and parish councils pay for police officers and the Met then matches their funding, meaning areas get two cops for the price of one.

It’s bogof, like at Boots with shampoo.

While bogof promotions are rare, individual supermarkets launch special deals every week, prompting shoppers to switch loyalties in search of a bargain.

Scores of promotions are in place at any one time in supermarkets Buy-one-get-one-free, or "bogof", deals are the most popular supermarket promotion among shoppers, a survey has claimed.