Dates:
January 6 1931 – 1996
Designed by Frank Matcham. The building was demolished in 1996 and rebuilt to modern standards.
October 1998 – present
The new building opened in October 1998.
Official website: https://www.sadlerswells.com/venue-hire/auditorium/
Equipment
From The Stage Guide 1971
Electrics: Strand CD/TH board on SR perch platform. Dimmers – 120; 1 preset; 5 groups. Circuits – FOH 26; Flies 49; Stage dips 26. Socket type – 15A BESA. Total Capacity to stage – 1050A on 3 phases. Special effects supply – 60A on each of 3 phases. 2 sunspots in projection box above Balcony. Footlights have been installed but have been removed and trough covered in.
Sound: Console SR. 2 x 30W amplifiers. No tape decks or turntables. 4 mic sockets on stage (Reslo). 4 loudspeaker sockets.
Exhibits from this venue in the Backstage Heritage Collection
Links to information about equipment at Sadlers Wells Theatre over the years
Documents

Strand Electric quote for System CD for Sadlers Wells (July 1956)
[400kb PDF]
From David Bertenshaw Collection