<i>You're planning to eat around Museumopolis on a Sunday lunchtime outside school holidays.</i>

It is actually Saturday that we will be there.

<i>Tombo, just to the side in Thurloe Place, serves what's in effect all-day Japanese afternoon tea with lots of allegedly nutritionally correct savouries. It might be just the kind of snacky thing you really need in between two intercontinental flights.</i>

Thank you for that recommendation. Looks like an excellent option - we both love Japanese (and Westernized Japanese) food. Mapping it out, I also see a place called Dozo nearby that also could be a good option.