Globetrotting Leeds duo set remarkable new Guinness World Record by visiting 20 UNESCO World Heritage Sites in just 24 hours

Tireless Chris Fletcher, 39, and Adam Leyton, 42, hopped on and off 36 buses, planes and trains as they traversed three countries and 1,200 miles.

The pair from Leeds made whistle-stop visits to iconic spots including Brussels' La Grand-Place, the canals of Amsterdam and the Tower of London.

Business partners Chris and Adam begun their breathless trip at 4am on Thursday at the spectacular Neolithic flint mines in Wallonia, Belgium,

They visited 18 more locations across Belgium, Holland and England before finishing at Blenheim Palace in Oxfordshire at 3am on Friday morning.

The pair then travelled back into London to Guinness World Record HQ to be named official record breakers and be awarded their certificates.

As well as breaking the record for most sites visited in a day, Chris and Adam also claimed the record for most seen in 12 hours, after clocking up 15 in that time.

Speaking hours after the achievement, Adam said: "We are absolutely buzzing to have claimed the record but completely exhausted at the same time.

"I can't wait to get home and collapse into bed."

A World Heritage Site is a landmark or area which is chosen by the United Nations Educational, Scientific and Cultural Organization (UNESCO) as having cultural, historical, scientific or other form of significance, and is legally protected by international treaties.

The sites are judged important to the collective interests of humanity.

Chris and Adam, from Leeds, West Yorks., who co-own a digital marketing agency called CEE Digital, spent a matter of minutes at most sites before hot-footing it to the next.

Chris said: "We were flying through the sites so quickly that unfortunately, it was really hard to stop and enjoy them.

"There were lots of pretty buildings and amazing places that we would have loved to have stayed at for some time and seen but there was no time.

"I think we've both identified a few that we would like to go back to in the future."

The 39-year-old said he would like to revisit the Van Nelle design factory in Rotterdam, known for its beautiful architecture, and Rietveld Schröder House, a home built with creative genius, in Utrecht at a later date.