Pan Pacific London

The Pan Pacific gave the City of London something it badly needed: a big, modern, genuinely impressive wellness floor. The spa runs to a dry sauna, steam room, and an 18.5-metre indoor pool, all in a calm, contemporary setting that feels generous rather than squeezed-in — a rarity in the financial district. It's a newer hotel, so everything is fresh and well-engineered, and the pan-Asian service is warm and efficient. Rooms are sleek and comfortable, with good City views from the upper floors. It tends to be (slightly) better value than the Mayfair grandees while offering more actual swimming-and-sweating space than most of them, which makes it a smart pick if facilities are your priority. Sauna and pool access is included for guests; the pool is a real highlight, so leave time for both.