Established in 1894, the TMA is a leading trade association representing the interests of and providing professional support for the performing arts in the UK. Their members include theatres, arts centres, concert halls, commercial producers, touring theatre, opera and ballet companies, and suppliers to the performing arts.

tmauk.org

The Theatrical Management Association uses Web's membership system and comes with a host of features including;

Membership Admin
Membership renewals
Contacts System
Full Reporting
Label Export 
Surveys Forms
Booking of Events 
Events Diaries
Assisted Performances Touring Shows
Vacancy Manager
Promotions