The Dorchester isn't far behind at £36, while the Ritz is also up there at £35 each, according to the Guardian.
If you've got enough cash to stay at these five-star hotspots, you might not be too worried; but if you're looking for a breakfast that won't lead to bankruptcy, it's well worth heading to one of London's many street side cafes and pubs as an alternative.
Meze Mangal Restaurant in South London is ranked seventh out of 1000 London restaurants, with only the gourmet delights at Michelin-starred haunts beating it, including the likes of: Gordon Ramsay's Petrus and Restaurant Gordon Ramsay, Brett Graham's The Ledbury, and Michel Roux's La Gavroche.
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Tucked away in south west London, Bruce Pool's one-star Michelin restaurant is slightly off the beaten tourist track - but that doesn't mean it should be overlooked, say reviewers. The £35 prix fixe three-course Sunday lunch menu is "fantastic". Visit chezbruce.co.uk
This tapas restaurant in Soho is "as close as you'll get" to a Spanish bar. It's praised by reviewers for its laid-back atmosphere and fresh produce: many recommend the gambas al ajilla and tortilla. The restaurant doesn't take reservations, so arrive early or expect to wait (preferably with a glass of cava at the bar). Prices vary depending on how much you indulge - but for a full meal they average at £46 per person. Visit barrafina.co.uk.
Owned by Nigel Platts-Martin and Bruce Pool, La Trompette prides itself on its informal but stylish dining venue and creative menu. Based in Chiswick, it's a particular favourite with west Londoners. Early evening menu starts from £17.50 for two courses. "The foie gras and brioche is to die for" says one reviewer. Visit latrompette.co.uk
With two Michelin stars to its name, this restaurant has gained many accolades, and ead chef Brett Graham is praised for his creativity, not least with his puddings: "Our pannacotta with blood orange bienets was out of the is world," says one reviewer. Average lunch price range: starters around £15, mains for £30, desert £10. Visit theledbury.com
A British steakhouse in the heart of Covent Garden, this gem has an atmosphere that is "part Ivy, part gentleman's club" says one reviewer. "The food brings a smile to your face and warms your soul", says another, while several rave about cornflake milkshakes. Price range: £42-£62. Visit thehawksmoor.com.
With three Michelin stars to its name, you'll spend anything from £50 to £180 plus for a meal here. Ducasse is known for his French cuisine and has been widely decorated for his achievements: in 2003, he was named as the Finest Chef in the World by the American Academy of Hospitality Sciences. "The £55 menu affords an unbelievably high standard of food and service in a beautiful setting," raves one reviewer. Visit alainducasse-dorchester.com
With its low-key decor and subdued lighting, Goodman prides itself on bringing the New York Steakhouse to London, with prime cuts from grain fed herds which are matured in the restaurant's own dry-ageing room. Prices range from £26 to £40. "It's not cheap but blinking heck it's more or less Bond Street and possibly the best steakhouse in London" says one reviewer. Visit goodmanrestaurants.com
Singled out for its "wonderful combination of quality, inventive cooking and good value," Moro has become a central London institution since it opened in 1997, specialising in Moorish cuisine and serves tapas throughout the day. Try the sherries and wood roasted chicken. Price range: £18-£30. Visit moro.co.uk.
Gordon Ramsay's Knightsbridge institution now offers popular chef master classes with head chef Sean Burbidge . The a la carte lunch menu starts at £30 for three courses and you're served "delightful" amuse bouches. Visit gordonramsay.com/petrus
Top of the list of London's eateries, Michel Roux's two-star Michelin restaurant is also the favourite restaurant in Europe, according to Tripadvisor. Set price lunch: £52, including three courses and half a bottle of wine. Reviewers recommend it for the first class service ("attentive without being annoying") and the eight-course 'menu exceptionel' with matching wines. Visit le-gavroche.co.uk.