London

Late spring to early autumn suits sightseeing, though popular attractions and parks are busiest then.

Changeable weather is common; pack layers and waterproofs, even during warmer months.

Accommodation and major attractions can be expensive; use contactless travel and free museums to save.

The Underground, buses and trains cover the city well, but services can be crowded and disrupted.

Explore the Tower of London, Westminster Abbey, British Museum, National Gallery and markets around Borough and Camden.

Take normal big-city precautions, especially against phone theft in crowded transport hubs and attractions.