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Where new musicals begin

Mercury Musical Developments (MMD) is a membership organisation dedicated to musical theatre writing.

We are a thriving community of over 400 composers, lyricists and book writers from across the UK and the world. We run a year-round programme of initiatives designed to support members through a range of professional development and showcasing initiatives, including masterclasses, residencies, writers’ groups and mentorships.

We connect the wider theatre industry with writers and their musicals, seeking out opportunities, discovering talent and nurturing new work, ensuring that British musical theatre has a bright future.

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What's Going On

News, events and upcoming opportunities

MMD Writers Labs 2026: Applications Open

MMD are pleased to announce that applications are now open for all three of our current Writers Labs – and for our brand-new early-career Writers Lab, which is beginning...

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MMD Writers Labs 2026: Applications Open

MMD are pleased to announce that applications are now open for all three of our current Writers Labs – and for our brand-new early-career Writers Lab, which is beginning in late August!   MMD's Writers Labs provide a supportive environment for musical theatre writers to share their work and receive artistic and professional support from...

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July 8 @ 1:30 pm - 2:15 pm

Musical Bites: Something In The Water

Our lunchtime series of new musical readings, Musical Bites, returns this Summer with...

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July 15 @ 1:30 pm - 2:15 pm

Musical Bites: It’s Christmas, Carol!

Our lunchtime series of new musical readings, Musical Bites, returns this Summer with...

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July 15 @ 7:30 pm - 10:00 pm

HOT MESS Theatre Trip + Q&A

HOT MESS Member Event! Join MMD/MTN members and staff at The Other Palace...

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July 29 @ 1:30 pm - 2:15 pm

Musical Bites: Theo In Between

Our lunchtime series of new musical readings, Musical Bites, returns this Summer with...

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July 30 @ 7:30 pm - 8:30 pm

How To Succeed In Business: Rights, Royalties & Contracts

This workshop is the third event in a three-part series 'How To Succeed...

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August 11 @ 2:00 pm - 4:00 pm

Edinburgh Fringe: New Musical Theatre Meet Up

  Are you taking a new musical to the 2026 Edinburgh Festival...

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August 28 @ 6:45 pm - 8:45 pm

Sea Change: Theatre Trip & Informal Meet Up

We're excited to share a special MMD discount on tickets to Sea Change,...

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February 11, 2026

I Organised A Musical Theatre Bookwriter Wikithon And All I Got Was 59,000 Article Views – Blog by Helen Arney

On a cold January afternoon, nine musical theatre bookwriters, two Wikimedia trainers...

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Memberships

Join MMD and become part of a community of writers at the forefront of new musical theatre

Masterclasses and talks

Attend regular events led by industry experts and grow your knowledge and skills

Advice and script reading

Get feedback on your writing, mentoring and practical advice

Meet other writers

Create a network and find your collaborators

Career opportunities

Showcase your work and make industry connections

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