Seven free rooftop viewpoints in London. Some need booking:
- Just walk in: Garden at 120 (120 Fenchurch St, EC3M 5BA; there's often a queue but it moves fast), One New Change (One New Change shopping centre, EC4M 9AF), Post Building (29-31 New Oxford St, WC1A 1BA).
- Book online first: The Lookout (8 Bishopsgate, EC2N 4BQ), Horizon 22 (22 Bishopsgate, EC2N 4BQ), Barbican Conservatory (Silk St, EC2Y 8DS).
- Sky Garden (1 Sky Garden Walk, EC3M 8AF): free tickets are released 3 weeks ahead, so book as soon as they open.