Crowd of more than 22,000 people – and the musician himself – filled Hyde Park with the ‘largest gathering of people wearing bald caps’A tight plastic cap is not an attractive option for protective headwear in 30C (86F) heat.

Crowd of more than 22,000 people – and the musician himself – filled Hyde Park with the ‘largest gathering of people wearing bald caps’A tight plastic cap is not an attractive option for protective headwear in 30C (86F) heat.