Today is Pancake Day in the United Kingdom, or Shrove Tuesday, as it's known on the Christian calendar. It's a time for indulging before the beginning of Lent and, in Britain, racing around with a frying pan, flipping pancakes.

Every year, people gather in backyards and on streets for pancake races, which have a history dating back centuries. This morning, members of Parliament and the House of Lords took on national media in a relay race around a garden along the Thames, just down the street from Big Ben. Wearing white chef's hats and aprons, they flipped pancakes and handed off frying pans in a 10-lap race to raise money for Rehab Group, a health charity that helps people with brain injuries.

That worthy cause, though, did nothing to restrain the race's traditional shoving and cheating, which is part of the fun. Racers stuffed extra pancakes in their pockets, in case they dropped the ones in their frying pans, as they often did. Speaking before today's race, Liz McInnes, a member of parliament from northern England, recalled some members of the Upper House hitting the deck in the 2016 contest.

"There were Lords on the floor last year. I was running over Lords who'd fallen over," she said. "I stopped to pick my pancake up last year, which was a mistake — never pick it up if you drop it."

Carrying an extra pancake in your pocket is "part of our tactics," McInnes said. "Any rules are made to be broken, I think."

The origins of Britain's pancake race are decidedly more civilized. The story goes that a woman lost track of time while cooking pancakes on Shrove Tuesday back in 1445. When she heard the church bells ring, she rushed out the door and raced to church while still holding her frying pan.

Some of today's participants grew up with the pancaking racing tradition, including Tim Loughton, a member of parliament with the Tory party who represents part of England's south coast and is the son of a minister.

"We used to do it in school," said Loughton, before the race. "My father was a vicar, so Pancake Day and Easter and the build-up towards that was always a big thing for us. So, yes, pancakes are in my blood."

British racing pancakes bear no resemblance to the fluffy ones Americans might eat at an IHOP. The U.K. version is flat – more like a crepe — and tends to split apart by the third flip. The ones distributed for today's race came in a packet and were store-bought.

"There's a big debate now over what you should have in a pancake," said Clive Lewis, a parliamentarian with the Labour Party. "You can have Nutella on it, or butterscotch. Back in the day, the tradition is just lemon and sugar," which is Lewis' favorite.

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