Are you, or do you know anyone that is disabled? If so ring the Royal Opera House on 020 7304 4000 and ask for their 'Access Membership'.

It's free, the person that gets it gets 25% off tickets, gets to take a 'carer' free of charge and other stuff.

Even if you don't live in or around London, worth it if you take a break here as it's FREE! Thought I'd tell you as I know you all like a bargain!