The normal performance schedule is below.

AT THIS TIME, THE MONKEY ALSO SUGGESTS VERY STRONGLY THAT YOU CHECK EMAIL AND TEXT MESSAGES ON THE DAY OF PERFORMANCE AS FREQUENTLY AS POSSIBLE, AS PERFORMANCES MAY BE CANCELLED AT VERY SHORT NOTICE, SOMETIMES EVEN ON ARRIVAL.

This list is the current envisaged schedule for West End productions, without extra performances added or cancelled during holiday periods. Also included are productions due to begin performances soon, but which may not yet have opened.

For other venues, which present a variety of productions, see their official websites for information. Currently, all are either closed, or offering only a handful of shows on specific dates:
Barbican Theatre, Barbican Pit Theatre and Barbican Hall: www.barbican.org.uk
Hammersmith Apollo: www.eventimapollo.com
Leicester Square Theatre: www.leicestersquaretheatre.com.
Peacock Theatre: www.peacocktheatre.co.uk
Royal Albert Hall: www.royalalberthall.com
Royal Festival Hall, Queen Elizabeth Hall, Purcell Room: www.southbankcentre.co.uk
Wembley Arena: www.ssearena.com

The monkey advises checking performance times on your tickets and that performances are happening as scheduled, before travelling.  
Running times where given under show titles - in hours (hrs) and minutes (m) - are VERY APPROXIMATE ONLY and can vary at any individual performance.
ALL details are given in good faith, but Theatremonkey.com cannot accept responsibility for any changes or error, nor subsequent losses incurred.