Britain's Secret Shoppers

Entrepreneur Justin Preston takes British shoppers and turns them into savvy hagglers. The first episode features widow Jan, who feels out of her depth when it comes to buying a new car. Jan's budget doesn't stretch to the motor of her dreams and, after a failed attempt to drive a hard bargain with one car salesman, she gets a crash course from Justin in how to haggle thousands of pounds off the asking price.

Would you have the confidence to walk into a designer boutique and ask for money off an impressive frock? This time in `Britain's Secret Shoppers', two label-loving ladies give it a go, with the aid of dealmaker Justin Preston who helps them haggle money off via a hidden earpiece. Also, three streetwise London cabbies, all with the gift of the gab, and armed with hidden cameras, hit London's hi-fi stores.

Justin helps a soon-to-be wed couple get the deal of the century, saving thousands of pounds on their dream kitchen. He also turns secret shopper to help one of the country's oldest coach firms, whose trips are so undersubscribed they have to cancel nearly half of them. The team at 'Which?' magazine examine fixed-rate mobile phone tariffs and discover that some of them aren't always the deal we think they are.

Justin Preston helps a couple who are up from the seaside to haggle over the cost of a posh dinner and room in a swanky hotel in the millionaire's playground of Mayfair. It's nerve wracking for them, but they're keen to give it a try. Will Justin's expert advice give them the results they really want? In Liverpool, Justin heads to one of the city centre's oldest fancy dress shops.

Justin Preston wants to show a soon-to-be wed couple looking to book their honeymoon that brilliant travel deals can still be had in high street travel agents. He also turns secret shopper in a Lancashire pet store that's going to the dogs; helping the rookie owners bulk up their bottom line by offering cut-price deals to attract locals into the store.

Justin Preston goes behind the scenes of one of the nation's biggest retailers: the winter sale at John Lewis. With his access-all-areas pass he reveals the sales secrets of the store and shows how to get the biggest and best discount deals. Plus he shares tips on how to bag a bargain on the high street at any time of the year. Justin also goes undercover to get two sets of shoppers to buy a telly and a sofa.