The British Library
Restaurant in London — 4.5★ (3,597 Google reviews).

Cafés · London
The King's Library Café sits in central London, an easy spot for a cafe stop if you're nearby. It's a mid-priced cafe, though with a low Google rating of 2.2 it may be worth a quick check before you go out of your way.

The secret to a calmer meal out? Something to do that isn't a phone. Each pack is full of screen-free bits and bobs to keep little hands busy at the table and buy you a proper sit-down. Three printable packs, one for each age (toddler, preschool, primary) — free, straight to your inbox.
Restaurant in London — 4.5★ (3,597 Google reviews).
Restaurant in London with a kids menu, highchairs and outdoor seating — 4.5★ (840 Google reviews).
Italian in London with highchairs and outdoor seating — 4.6★ (1,432 Google reviews).