ENO. Half price. Yet another offer.
LondonTheatreDirect.com have a very limited allocation of seats for La bohème, The Barber of Seville and Medea in all areas of the theatre at half price (plus £3 fee).
Ignore the 'save £29' and similar banners on the site, because most of the discounts are even higher. Just pick the number of seats you want for the selected date, and you are shown exactly which seat numbers are available, and how much they cost. Brilliant.
Bear in mind that, as ever, bigger discounts will probably be available on the day at the TKTS booth (availability not guaranteed).
Thanks to reader Grahame for spotting.