Dining at The Landmark London

A luxurious Victorian ballroom in Marylebone, perfect for elegant celebrations and events.

From: £150 per person

Capacity: Up to 650 guests

Events at The Londoner

A vast, pillar-less ballroom in a super boutique hotel, ideal for large receptions and events.

From: £105 per person

Capacity: Up to 800 guests

Business at Royal National Hotel

A grand pillar-free ballroom in Central London, ideal for large conferences and events up to 700.

From: £49 per person

Capacity: Up to 800 guests

Business at The Dorchester

From: £130 per person

Capacity: Up to 1000 guests

Business at Radisson Blu Hotel, London Bloomsbury

From: £60 per person

Capacity: Up to 332 guests

How many breakout rooms are needed for a 300-person event?

Plan for at least two to three breakout rooms sized 50–75 m² each, accommodating 30–50 delegates cinema-style. This allows parallel workshops, ensuring groups remain under 20 people per facilitator for focused sessions.

How much space is required theatre-style for 300 delegates?

Allocate 1.5 m² per delegate in theatre-style for comfort and circulation, totalling c.450 m². Add a 20% buffer for aisles, PA desks and front staging, bringing the room size to c.540 m².

Are there capacity limits or noise restrictions for conferences in Marylebone?

Fire-safety regulations in Westminster cap halls at certified capacity (300 for standard ballrooms). Night-time noise abatement restricts amplified sound after 11 pm; confirm venue licencing and potential sound-proofing.

How far in advance should I book a Marylebone venue for 300 guests?

High-end conference spaces in Marylebone typically book 6–12 months ahead. For peak midweek dates (Tuesday–Thursday), secure your date at least nine months in advance to access best rates and room layouts.

What is the minimum hire duration for a 300-person Marylebone conference hall?

Standard minimum is 8 hours (often 9 am–5 pm), with additional half-day options. Evening-only hires are rarer and usually incur a premium of 20–30%.

What is the standard day delegate rate for a 300-person conference in Marylebone?

Expect a day delegate rate of £75–£120 per head, including meeting space, two coffee breaks, buffet lunch and basic AV (projector, screen, PA). Higher-end rooms with integrated 4K projectors and dedicated tech support trend towards the top of this range. Most rates apply Tuesday–Thursday.

What catering options suit 300-person conferences in Marylebone?

Most venues offer buffet breakfast and lunch for 300 at £40–£60 per head or plated lunch at £60–£80. Cocktail receptions range £30–£45 per head. Ensure dietary requirements (vegan, gluten-free) are catered and service staff ratios are at least 1:25.

How much deposit is required to secure a 300-person venue?

Vast majority require 10–25% of estimated minimum spend up front (typically £2,000–£5,000). Deposit secures date and covers initial prep; balance is due 14–30 days before the event.

Which transport links best serve Marylebone conference venues?

Main hubs: Baker Street station (Zone 1, five Underground lines) is 2 minutes’ walk; Marylebone station (Zone 1, Chiltern Railways) is 7 minutes. Bus routes 18, 27, 205 connect Westminster, Piccadilly and Paddington. Black cabs and TfL bike stands are immediate.

What AV equipment comes as standard in Marylebone conference venues?

Typical inclusions: dual 8K laser projectors, 2000-lumen brightness, 3×3 m screens, lapel and handheld microphones, dual full-range speakers, mixer desk and one on-site technician. Ensure wired and wireless internet (minimum 100 Mbps) is installed.