Mauro Colagreco at Raffles London at The OWO

A Whitehall Address With a Long Memory

The Old War Office on Whitehall spent the better part of a century as one of Britain's most sequestered government buildings. Winston Churchill worked there. Military intelligence passed through its corridors. When Raffles converted the Edwardian baroque structure and opened it as a hotel in 2023, the project drew attention less for what luxury brands typically do with heritage buildings and more for the sheer weight of the address — 57 Whitehall, a few hundred metres from Downing Street, in a building whose public life had been essentially invisible for generations.

The dining room that now occupies the ground floor operates at a different register from the hotel's grander architectural gestures. It is, as Michelin's assessors note, elegant, comfortable and discreet — a room that doesn't need to announce itself against its surroundings. That restraint is a deliberate choice in a building where every other surface competes for attention.

Where It Sits in London's Formal Dining Tier

London's top-end modern cuisine bracket , the segment where the pricing is ££££ and the technical ambition is sustained across multiple courses , is not short of competition. Story, Cafe Cecilia, and Row on 5 each occupy distinct positions within the broader creative-cooking conversation, while CORE by Clare Smyth, The Ledbury, and Restaurant Gordon Ramsay represent the long-established Michelin tier. Dinner by Heston Blumenthal , which, like this room, operates inside a major hotel , demonstrates that the hotel-dining format can sustain serious critical attention over time rather than trading purely on the parent brand.

Mauro Colagreco at The OWO enters that conversation with Michelin recognition already secured and a specifically stated editorial identity: the primacy of British produce, technically ambitious preparation, and a kitchen that asks the diner to reconsider the hierarchy between plant and protein. That last point is structural, not cosmetic , the menu lists vegetables before meat or fish, which shapes how courses read and how the kitchen's priorities are communicated.

The Produce Argument at the Core of the Menu

More than 70 varieties of British fruit and vegetables cycle through the kitchen here. That number matters as a statement of sourcing depth rather than as a marketing figure. Most formal London kitchens with comparable price points rely on a narrower vocabulary of premium produce; building a cooking identity around breadth of British botanical variety puts this kitchen in a smaller peer group alongside places like Dysart Petersham, where produce sourcing is treated as a primary editorial commitment rather than a supporting detail.

The cooking Michelin describes as sophisticated and technically elaborate, with intriguing combinations of flavour and texture. The produce-first menu architecture means that what drives the creative decision-making in each dish is the ingredient calendar rather than a protein-centred template. This approach has become increasingly common at the leading of British fine dining , you can trace a similar instinct at L'Enclume in Cartmel and, in a different register, at Moor Hall in Aughton , but the specific application of it to a London hotel dining room at this price point is a narrower category.

Beyond Britain, the broader template has parallels in Scandinavian modern cuisine, where kitchens like Frantzén in Stockholm have built international reputations on sourcing discipline and technical precision at comparable formality levels. The Dubai iteration, FZN by Björn Frantzén, shows how that model translates into luxury hotel contexts , a structural parallel to what The OWO dining room is attempting within the Raffles brand framework.

Critical Reception and What It Signals

Michelin recognition arrived with language that is specific rather than formulaic. The assessors called out the flavour and texture combinations as intriguing , not merely competent , and the service as both structured and relaxed, which is a precise observation about a tone that many formal rooms fail to achieve. The wine pairing note is equally deliberate: well-considered rather than comprehensive for its own sake. These are the kinds of distinctions that separate a functioning fine-dining room from one that has worked out what it is actually doing.

For context on what Michelin-level British country cooking looks like at its most ambitious, the tradition runs through Le Manoir aux Quat' Saisons in Great Milton, Gidleigh Park in Chagford, The Fat Duck in Bray, and Hand and Flowers in Marlow. The OWO dining room is not trying to occupy that rural-estate register; it is a city room with a city tempo, but the critical expectations it is held to , and appears to be meeting , belong to the same category of serious intent.

Google reviewers have landed at 4.7 across 48 responses, a score that sits comfortably above average for London's ££££ tier but, with a relatively small review count given the hotel's 2023 opening, still represents an early data point. The trajectory from a 2023 launch to Michelin recognition is faster than most hotel dining rooms achieve. 104 represents another recent entrant making a case in the same city-formal category.

The Room and the Service Register

Hotel dining rooms at the very leading of the market have historically struggled with one of two failure modes: they either feel annexed from the hotel , a fine-dining box dropped into a lobby floor plan , or they feel subsumed by the parent brand, as if the cooking exists to serve the architecture rather than the other way around. The OWO dining room, based on Michelin's description, appears to have avoided both. The comfort and discretion of the room, the service pitched between structure and relaxation , these suggest a dining identity that operates with its own logic even within one of London's most visually dominant heritage buildings.

The wine list's breadth, and the care taken with pairings, positions this as a destination for considered drinking alongside food rather than a room where wine is an afterthought to the cooking spectacle. That balance is harder to achieve than it sounds in kitchens where technical elaboration tends to crowd out the sommelier's contribution.

Planning Your Visit

The dining room opens for lunch Thursday through Saturday from 12 PM to 2 PM, and for dinner Tuesday through Saturday from 6 PM to 10 PM. It is closed Sunday and Monday. The price tier is ££££, placing it in the upper band of London's formal dining market. The address is 57 Whitehall, London SW1A 2BX, inside Raffles London at The Old War Office, a short walk from Westminster and Embankment stations.

For broader context on eating, drinking, and staying in the capital, see our full London restaurants guide, our full London hotels guide, our full London bars guide, our full London wineries guide, and our full London experiences guide.

Quick reference: 57 Whitehall SW1A 2BX | Lunch Thu–Sat 12–2 PM, Dinner Tue–Sat 6–10 PM | ££££ | Closed Sun–Mon