The Pool at Hotel Lancelot
Lancelot Hotel's pool is mentioned by travel writers. Of the 3 publications that we tracked, 2 referenced the pool, like Lonely Planet and Oyster.
Hotel Lancelot 
Lonely Planet
Oyster
Lonely Planet "There’s a rooftop pool with adjacent small gymnasium, plus regular live, smoochy jazz in the bar"
Oyster "Both areas are visible from the hotel’s rooftop pool terrace, although guests complain that the pool is not heated"
