Nearly 20,000 people are having an affair in Leeds

The index, from the dating website Illicitencounters.com, claims to show the number of people cheating in a local area based on their user numbers and population.

Leeds is ranked 37 out of all cities in the United Kingdom with 19,104 people cheating on their partners in the city meaning 1.08 per cent of the capital city's people are being unfaithful.

Most cheaters in England

Out of the bigger cities in England, St Albans has the most cheaters compared to population size according to the website, with 5,631, or 2.74 per cent, of residents in the city reportedly cheating.

This ranks top of all UK cities.

Durham is also worse than Leeds with 5,650 residents, or 2.4 per cent of people being unfaithful.

Those living in Newcastle are not far behind with 21,074, or 1.91 per cent of residents cheating on their partners.

Durham the best place for cheaters in North

Windsor in Berkshire has the highest proportion of cheaters in the United Kingdom, with Beverley in East Yorkshire the highest northern town in eighth with 3.11 per cent of its population cheating.

The most faithful town in England for the monogamous amongst us is Bournemouth where only 0.17 per cent of people are unfaithful.