More than 600 people are having an affair in Runcorn and more than 500 in Widnes, according to figures by a dating website for married couples.

IllicitEncounters.com has created an ‘Infidelity Index’ to search and discover how many people are looking for an affair in your area.

A search under ‘Runcorn’ reveals a total of 632 people are cheating on their partners, while Widnes is home to 535 cheaters. Neighbouring Warrington has 418.

Maidenhead has claimed the title of most illicit town in Britain with more than two per cent of the population cheating, with Bournemouth declared the most faithful.

A spokesman for IllicitEncounters.com, Mike Taylor, said: “It is fascinating to see the breakdown of how many people are looking for affairs in your local area, who wouldn’t want to see if they live in a hanky panky hotspot?

"We have already had thousands of people visiting the website looking to see where their home town ranks compared with their friends.”