For reasons only known to the man himself, one man decided that he was going to eat at every single McDonald's  outlet in London in under 24 hours.

James Ware called his mission to eat at every one of McDonald's restaurants in London a "McMarathon", and made a video chronicling his adventure on YouTube.

The man ate 46 meals, one each at every McDonald's restaurant in the city, Time reported.

He explained his undertaking saying he was going to try something different at each McDonald's London outlet he visited and see by the end whether he would be lovin' in or loathin' it.

The YouTube video of his feat was posted, appropriately so, on Fat Tuesday.

He started his stuffing journey at 8:00 a.m., covering the breakfast offers in seven different restaurants and eating seven different breakfast items before they stopped being offered at 10:30.

He then moved on to chicken burgers, cheese burgers and milkshakes.

He was journaling how he felt, and with 12 McDonald's outlets behind him and 34 more to go, he finally said he was only just starting to feel filled.

As he goes on to record the rest of his McMarathon, he observes that his face is getting flushed and his hands have started to shake, as was only to be expected. He makes a statement that is sure to make viewers cringe - proclaiming he is glad he is not his own internal organs at that moment.

Strangely enough, the one concern he did seem to have was not making it to all restaurants before closing time.

But he kept at it. By the time he finished with his quest he had spent just under $130 on food, and around $30 more on transportation.

Bizarrely, he was still smiling as he munched the last of his 46 meals. "I've learned about parts of London I didn't know, foods I didn't know, and parts of my body I didn't know could feel pain," he proclaimed in his video.