[1] The Theatre has a seating capacity of 541 and offers a professional programme of innovative music, drama, comedy and dance throughout the year.

[4][5] The basement below the Theatre holds the Bloomsbury Studio, a black box performance space with a flexible seating configuration and capacity.

Many notable artists have performed at the theatre, including UCL alumnus Ricky Gervais who performed two of his standup shows there, both of which were filmed for release on DVD and was the venue for Crusader Norman Housley come-back lecture series: Contesting the Crusades, which he developed into a popular history book.

[7] From 2001, the theatre provided a residency for the New London Orchestra[8] and hosted Robin Ince's "Nine Lessons and Carols for Godless People" for several years.

[10] Christopher Nolan and Emma Thomas met while being members of UCL Film Society and credit the Bloomsbury theatre as being key to developing their careers in directing and producing.