PREVIEW: Martin Lewis' Extreme Savers, ITV

In this new four-part series, ITV's financial guru Martin Lewis introduces some of Britain's most extreme savers - who are willing to keep hold of their cash.

From those who utilise reusable toilet rolls to those who shower in rainwater, to foraging for food and living off-grid - this programme features people who have made it their life's mission to save as much cash as they can, often using the advice of Martin, but taking it even further.

The first episode features 'comper' Katrina Stevenson, who has claimed thousands of pounds worth of prizes by entering competitions. It all started when she won a holiday - and decided to go for more.

The show also features Lee from Stoke on Trent, who was so fed up with paying extra charges for luggage on flights he had a special coat made - and now travels with all he needs in his coat of many pockets - and pays no fees.

Charlotte Jessop from Norfolk tells the programme she needed to cut back on spending after stepping back from work to spend more time with her family, so makes her own food wraps, sanitary products and nappies - and uses reusable toilet rolls.

Finally 73-year-old Eric Hawkins takes saving water and money very seriously by taking advantage of a free commodity - rain. He collects every drop he can and has managed to cut his water bills by thousands over the years.

Martin Lewis' Extreme Savers begins Wednesday 12th May at 8pm on ITV.