Sir Ian McKellen has launched a fundraising appeal to support front-of-house and backstage theatre workers affected by the pandemic shutdown.The actor has teamed up with The Theatrical Guild to raise money for food, housing costs and mental health services, and kicked the fund off by donating £40,000.McKellen chose The Theatrical Guild as one of the charities to receive proceeds from his one-man show, and is calling on theatre enthusiasts to match his donation with pledges of their own.He said: