Yeah we keep trying this but lose out on that 20 mins.
Btw, London does not have good Indian places. However, if you two are interested, book the Biryani supper club at Darjeeling Express, Covent Garden. It is every Sunday. 195 for the couple, but gets sold out so you have to book a few weeks in advance. 1pm to 4, 7 course meal. It is fantastic and the best Biryani I have ever had, better than in India. Tip: they serve so much quantity, and allow you to take home, that you can book for 1 veg and 1 non-veg, as the quantity will ensure you can both try both.