The Hogans and Bucks swap homes and budgets for the week at Christmas time - and although they live only 13 miles apart, their financial circumstances differ greatly. Noel and Lisa Hogan live in a five-bedroom house in Farnham with daughters Aysha and Amber, and thanks to ex-policeman Noel's private investigation company, they have a weekly budget of £3,336. Meanwhile, Tanya Buck lives in a Basingstoke council house with her three kids. She owns a cleaning company and after bills is left with £140 to live on. How will they manage living each other's lives for a week?

Families from series two and three reveal what happened when they met for the first time after living each other's lives. Intersperses memorable moments with newly shot footage.

The well off Lusks, who made their money from the manufacturing industry, swap places with the Bosleys who are used to getting by on less than one tenth of the Lusks income, brought in by mum Melanie who is a cleaner at a working men's club.

The Emmotts enjoy a budget of £1300 per week, affording golf, tennis, music and triathlon training. The Blakes have only £125 of disposable income, so treats include walks in the park and film nights at home. How will they react to life at opposite ends of Britain's wealth divide?

The Hornans are in the richest 10% in the UK while the Llewellyns are in the poorest 10%. How will they live at opposite ends of the wealth divide?

The Hansens take four holidays a year with a weekly budget of more than £1,300. The Gittings have occasionally resorted to attending food banks to feed themselves. How will each family adapt to living at opposite ends of the wealth divide?

The Hornans are in the wealthiest 10% in Britain, with luxury holidays, swimming lessons and a weekly budget of more than £2k. The Llewellyns are among the poorest 10%, and dream only of owning their own home with a garden for the kids to play in. How will they find living at opposite ends of the wealth divide?