Ian McKellan's favourite theatre

It was Sing along to Frozen this morning, so Ella, her mum and I toddled along with all the Annas, Elsas, Olafs and Svens up to the gods in Theatre Royal. Poor Ella hadn't been herself for a couple of days - not eating which is a rare thing for her, but like a true little trooper she rallied up for the singing and loved ever minute.

I know it is Ian McKellan's favourite theatre because he told me. Well said so in an interview. So it must be true.