A DATING website reckons it can estimate how many people are cheating on their partner in your postcode.
The Infidelity Index, compiled by IllicitEncounters.com - a dating website for married people, mapped the location data of its 1.1 million members against each town's adult population to find the most adulterous towns in the country.
The data found Liverpool was one of the most faithful cities in the UK while the most adulterous town in the country was Royal Tunbridge Wells, Kent.
Runcorn tops the Cheshire and Merseyside town ranking with an estimated 1,020 affairs involving 1.65% of the town's population.
Widnes is 18th in the table with 878 affairs while Warrington is 115th as 729 people are having an affair equating to 0.44% of the population.
Other areas on the 'Infidelity Index' include:
Crewe: 666 affairs
St Helens: 601
Christian Grant, from the site, said: "People have had affairs since the dawn of time, but the last decade in particular has seen a large spike.
"The site has grown exponentially, and it's thanks to the turbulent economy and increase in house prices that has left many people financially crippled, unable to divorce should their marriage hit the rocks.
"So, they seek the only other viable alternative that they have: an affair. It's cheaper than a divorce, and it's safer than ever before."