Plays that are more than three hours long seem to be popular this year as does starting them at 7.30pm rather then scheduling them a bit earlier.  This is a particular bug bear of mine and the issue arose again today when I checked the running time of Le Blancs at the National Theatre: 3 hours and 15 minutes with a 7.30pm start. So I took to Twitter to vent my frustration and turns out I'm not alone:

I think theatreland could do with carrying out some customer discovery.