Comedian Joel Dommett and Uncle Funk’s Disco Inferno will headline the opening bank holiday weekend of East Herts’ new £30m theatre. BEAM, Hertford’s new multi-purpose arts venue is hosting a family festival, supported by an Arts Council England National Lottery Project, including theatre and story-telling sessions, live music and Lego building. This will be followed by a week of family-focused shows to round off the school holidays. There will also be bookable tours of the new venue, previously known as Hertford Theatre, which has undergone a £30m redevelopment over the last three years. It n…