Tony Casemore is played by actor Dexter Fletcher. He first appeared in Season 1, Episode 1. Emily James stated that Casemore knows London inside out.
The character is currently the head concierge but his previous role was Deputy Manager. Casemore is married and has 2 kids; his daughter appears in Series 3. It is revealed in Series 3 that his family are often irritated at him for being at work a lot of the time.
Casemore takes his work very seriously and gets annoyed when Rebecca Mitchell says the word concierge sounds "seedy". He uses his knowledge of London helps the guests anyway he can, in some cases this includes finding prostitutes. Casemore has a good friendship with his fellow workers at the hotel, in particular Anna; their relationship could be described as paternal as well as good friends.