From Channel 4 Text:

Claire says that H’s most annoying habit is sniffing all the time.

“He used to drive me mad,” she tells us.

“He doesn’t do it so much now, but his nickname used to be Mr Sniff.”

Here is a review of Stomp:

A full on 70s stomp with gliding orchestral strings. Disco kings Chic are the inspiration for a typical Deeper Shade Of Blue-style uptempo monster. Learned the dance moves yet? 2 out of 3.