Summer 2025 Events | Sponsorship & Partnership Opportunities ☀️

Underbelly Summer in Leicester Square
Underbelly, a new addition to London’s 2025 summer events calendar transforms Leicester Square into a vibrant outdoor venue. Expect free film screenings, live sports (Wimbledon, UEFA Women’s Euros), and a relaxed space for Londoners and tourists to unwind.
Opening Hours:
- Mon–Fri: 12pm–10pm
- Sat: 10am–10pm
- Sun: 10am–9pm
Sponsorship opportunities for HOLBA members only:
- On-screen advertising
- Branded deckchairs
Date
9 June – 3 August 2025 (TBC)
Deadline
Friday 16 May 2025
West End LIVE 2025
West End LIVE showcases top West End shows over two days in Trafalgar Square, offering unforgettable live performances to thousands of theatre fans. It’s one of London’s most anticipated free cultural events.
Sponsorship opportunities open to all:
Get involved by contacting Westminster City Council for tailored packages.
Day 1
Saturday 21 June, 11am–5pm
Day 2
Sunday 22 June, 12pm–5pm
Location
Trafalgar Square, West End
Inside Out: Westminster’s Outdoor Arts Festival
Inside Out returns this August with live music, dance, theatre, family-friendly workshops, and public art. This free outdoor festival brings creative culture into public spaces across central London.
Sponsorship opportunities.
More information on how to participate coming soon.
Dates
TBC
Location:
Various open-air locations in Westminster
Art After Dark
HOLBA’s Art After Dark brings late-night gallery openings, pop-up performances, and immersive installations to central London. It’s a unique opportunity to align with London’s visual arts scene and reach high-value cultural audiences.
Sponsorship opportunities:
Details to be confirmed.
Dates:
October 2025
Location:
Various galleries and public spaces, West End