Finding the right venue for a mid-sized conference in London—between 300 and 500 delegates—requires balancing location, style, and functionality. Whether you’re hosting an AGM, product launch, or industry forum, these eight venues offer standout spaces with excellent transport links, tech facilities, and flexible layouts.
1. QEII Centre, Westminster
Located opposite Westminster Abbey, the QEII Centre is London’s largest dedicated conference centre. It offers a wide range of flexible spaces for up to 500 delegates theatre-style with cutting-edge AV and hybrid capabilities. Its prime location gives your event a sense of gravitas and professionalism.
2. IET London: Savoy Place, Embankment
A hub for tech-forward events, IET London offers the Turing Lecture Theatre with seating for 451 attendees. The venue combines heritage charm with modern technology and riverside views, making it perfect for conferences that want to inspire innovation and creativity.
3. One Great George Street, Westminster
This elegant, Grade II-listed building offers the Great Hall, accommodating up to 400 guests theatre-style. With stunning period features and high-spec AV, it’s ideal for events looking for a touch of London heritage combined with modern facilities.
4. The Brewery, City of London
A historic former brewery turned high-end event space, The Brewery blends industrial character with state-of-the-art amenities. The Porter Tun Room hosts up to 500 delegates theatre-style and is perfect for conferences, award ceremonies, and product launches.
5. Lindley Hall, Westminster
Part of the Royal Horticultural Halls, Lindley Hall offers a beautiful, versatile space accommodating up to 480 guests theatre-style. The venue’s Edwardian architecture and natural light make it ideal for exhibitions, conferences, and gala dinners.
6. Kings Place, King’s Cross
A modern cultural venue, Kings Place features Hall One seating 415 delegates theatre-style. Known for its superb acoustics and in-house tech support, it’s perfect for conferences where quality sound, staging, and presentation matter.
7. Royal Festival Hall (Clore Ballroom), Southbank Centre
The Clore Ballroom at the iconic Royal Festival Hall offers flexible space for up to 440 theatre-style guests. Its riverside location and cultural credentials bring creative flair to conferences, networking events, and awards ceremonies.
8. 133 Houndsditch (etc.venues), Liverpool Street
A contemporary, purpose-built conference centre near Liverpool Street, 133 Houndsditch features the Aldgate Suite, seating up to 500 delegates. Known for slick design, excellent catering, and high-spec AV, it’s a strong choice for corporate conferences and hybrid events.
🔍 Comparison at a Glance
| Venue | Capacity (Theatre) | Highlights | Location |
|---|---|---|---|
| QEII Centre | Up to 500 | Flexible, high-profile, government-grade | Westminster |
| IET London: Savoy Place | 451 | Modern tech, riverside views | Embankment |
| One Great George Street | ~400 | Heritage elegance, tech-ready | Westminster |
| The Brewery | 500 | Industrial-chic, versatile | City of London |
| Lindley Hall | 480 | Edwardian architecture, natural light | Westminster |
| Kings Place | 415 | Modern, cultural hub, great acoustics | King’s Cross |
| Royal Festival Hall | 440 | Iconic, cultural, riverside | Southbank |
| 133 Houndsditch | 500 | High-tech, modern, flexible | Liverpool Street |
✅ Why Choose Mid-Sized Venues (300–500 Capacity)?
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Perfect Scale: Large enough for impact, small enough for engagement.
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Prestigious Locations: Often situated in central, iconic parts of London.
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Flexible Formats: Theatre, cabaret, hybrid, or networking-friendly.
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Advanced AV: These venues typically offer robust tech setups for modern conference needs.
💡 Tips for Selecting Your Venue
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Consider Proximity: Prioritise transport hubs for easy access.
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Check AV Capabilities: Ensure the venue supports your tech requirements, especially for hybrid events.
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Align Style with Brand: Match your event tone to the venue’s ambiance—historic, contemporary, or creative.
🎯 Final Thoughts
London’s conference scene offers a rich variety of venues tailored for impactful events between 300 and 500 attendees. Whether you’re looking for modern riverside spaces, historic halls, or purpose-built hubs, these venues provide the setting to engage, impress, and inspire.
