The Room Service at London Marriott Hotel Regents Park
The room service at London Marriott Hotel Regents Park is praised by professional travelers. Out of 3 reviews that we tracked, 2 acknowledged the room service, like Star Service and Oyster.
London Marriott Hotel Regents Park 
Star Service
Oyster
Star Service "Room service runs around-the-clock"
Oyster "Clean, pleasant rooms offer more space than comparable central London spots, and include flat-screen TVs, mini-fridges, and 24-hour room service, but decor can feel dated and bland -- though the 2016 refurbishment promises a more modern style"
