The concrete-clad, 1960s modernist grandmother of them all: no theatrical tour of London is complete without a visit to the National, whose three auditoriums – Olivier, Lyttelton and Cottesloe – offer a rolling repertory programme, often with a choice of several productions in a week. The National Theatre may have once had a fiercely inaccessible reputation, but the arrival of maverick artistic director Nicholas Hytner in 2003 rocked theatreland as he set about changing the venue's staid ethos with daring productions such as 'Jerry Springer the Opera' and an ambitious adaptation of Phillip Pullman's 'His Dark Materials'. The change of tack proved a success, attracting audiences of mixed race, age and class – and Hytner's budget £10 Travelex-sponsored tickets still help pull in the crowds in the summer season. The home stable for Michael Morpurgo's 'War Horse', which opened here in 2007 and went on to break West End records, the National is now developing a reputation for family-friendly blockbusters, cue its current production of Mark Haddon's 'The Curious Incident of the Dog in the Night-time'. Meanwhile the National Theatre Live initiative has extended the theatre's reach by broadcasting high-publicity productions such as Danny Boyle's role-swapping smash-hit 'Frankenstein' and the comedy 'One Man, Two Guvnors', which introduced James Corden to the stage, live to Picturehouse Cinemas. A recent run of the post-modern musical 'London Road' proved it hasn't lost its edge. You don't have to buy a ticket to get a feel for the National's atmosphere – the alfresco stage, National Theatre Square, routinely lays on free and inclusive performing arts, gigs and exhibitions, especially during the Watch This Space summer festival.