Gourmet Burger Kitchen (GBK) is giving away free cheeseburgers to all London Marathon runners.

More than 39,000 people will take part in the gruelling 26.2 mile run on Sunday (April, 23).

Upon completion of the marathon, runners will be able to taste their sweet success in the form of a juicy cheeseburger.

And the best thing about it? It's free!

The only thing runners need to do is show their medal on Sunday, April 23.

There are ten GBK's across the London Marathon route, plus one of the two at the finish line (GBK Soho and Berners Street) so runners will have ample opportunity to indulge in a sumptuous burger.

The burgers can also be claimed on Monday April 24 (if you need to wait until the next day to be able to move again), at any of GBK's 84 restaurants across the UK, from Brighton to Edinburgh, and you'll need to eat-in.

Take a look at other offers London Marathon runners can make the most of:

20% off at Sweaty Betty

Get 20% off at Sweaty Betty
Get 20% off at Sweaty Betty

The stylish active wear retailer are offering 20% off everything to all those who finish the marathon.

All you need to do is take your medal to a store or send a picture to their customer care team.

The offer will only be available for a limited time, so its best to get your retail therapy in as soon as possible. Browse everything they have to offer here.

Free glass of Moët at All Bar One

Enjoy a glass of bubbly

For a much needed glass of fizz post-race, simply show your medal at the bar of any central London All Bar One ( find your nearest here ) on Sunday, and you'll get one free 125ml glass of Moët champagne.

Free smoothie from Crussh

Whether you're still high on the health kick post run or just craving some nutrients after all those free burgers, pick up a free medium "Green Protein Power" smoothie (usually £4.80) by showing your medal in store.

The smoothie includes spinach, lime, tofu, banana, yogurt and protein booster and you can find your closest Crussh here, but be careful if you plan to pick yours up on Marathon day, as some stores don't open on a sunday.

Free coffee from Pod

Just show your medal in any Pod branch on Monday 24th and you'll get a free coffee

Just show your medal in any Pod branch on Monday 24th and you'll get a free coffee

If you're heading back to work on the Monday after the marathon, you'll certainly be in desperate need of a good caffeine-infused pick-me-up.

You can pick anything priced between £1.90 and £2.65, including americanos, cappuccinos, flat whites, lattes, matcha, rooibos or tumeric lattes or a red espresso shot.

Free travel through London

Oyster card

Travel for free on any TFL service by simply showing your race number.

The free travel also includes a few services into the city, such as the c2c between Essex and London, and on the Oxford tube and the X90 bus on the Saturday and Sunday.

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