Official (?) London Theatre Guide

Ticketmaster UK

The Royal Albert Hall is near the conference venue.

Wikipedia - List of London venues

The British Library

Museums

The British Museum

The Natural History Museum (NHM) is near the conference venue.

The NHM is right next to the Victoria and Albert Museum.

Wikipedia - List of London museums

Art Galleries

The National Gallery

The Tate Britain

Parks and Gardens

The Royal Parks

Kensington Gardens is right next to the conference venue.

Wikipedia - Royal Parks of London