When does an urgent new trend become a theatre cliché? Over the past couple of years, the idea of generational conflict between the have-it-all baby boomers and the have-nothing-but-debts youngsters has appeared in plays such as James Graham’s The Whisky Taster and Mike Bartlett’s Love, Love, Love. Now the South Bank flagship, in a production starring national treasure Julie Walters, enters the fray with actor Stephen Beresford’s first play, which opened last night.

Although some contemporary plays — notably Posh and 13 — have accurately taken the temperature of the times, what about the timeless classics? Does Sophocles’s Antigone (dated about 441BC) have anything to say to us today? How can it be of our time too? As the National Theatre wheels out this play, with a cast led by Christopher Eccleston and Jodie Whittaker, onto its main stage, such questions hang in the air like the smoke from an ancient funeral pyre.

The competition for best dramatic use of a coffee table is won hands down by the wagon-wheel one that prompts a major argument in When Harry Met Sally. Runner-up is the one that appears in Detroit. So deliciously hideous that it gets its own laugh, the symbolic table from Ben and Mary’s nice suburban home is given to new neighbours Sharon and Kenny whose total lack of furniture stems from the fact that they only recently met during a spell in major substance-abuse rehab.

Religious mania is bad for your love life. In Enda Walsh’s revamped 1999 play — which has already been seen in Galway and New York, and opened in London last night — a 33-year-old man (played with immense conviction and enormous presence by Cillian Murphy) invites us inside his mind to explore the dark and dangerous caverns of religious enthusiasm and psychological collapse. Be warned: it is a strange, tormented and rather weird trip.

Like many a regular theatregoer, I have a little list of classic plays that I’ve never seen, or even read. One of these is, or rather was, Errol John’s evocatively titled Moon on a Rainbow Shawl. Written in 1953, this definitive “yard play” was a historic breakthrough for Caribbean playwrights in Britain. So it was with considerable anticipation that I went to this revival, which opened last night at Britain’s national flagship venue. But can this classic stand up to scrutiny?

“Do you feel morally superior to the Taliban? Well, do you?” And we’re off, with another of director/choreographer Lloyd Newson’s interrogations of a taboo subject. DV8 Physical Theatre is 25 years old this season, yet if anything, it, and Newson, have become more challenging, not less as the years go by. Gone are the lyrically silent pieces of the 1980s, and instead movement is almost always now allied with talking; indeed, talking has become Newson’s main mode of communication, as his urgent need to vanquish our beliefs and replace them with his becomes ever stronger.

Half-term may be nearly over for many, but there is no shortage of children’s theatre on offer in London at the moment. Long-running family favourites including Shrek the Musical and The Lion King have recently been joined by the mighty Matilda the Musical, and fans of Michael Morpurgo’s War Horse (still stabled in the West End) will be delighted by the author’s latest stage adaptation – Twist of Gold – playing at the Polka Theatre.

With its mistaken identities, a meddling mother, a chest of precious jewels, gulling of fops and two pairs of thwarted lovers, it's easy to see Shakespearean overtones in Oliver Goldsmith's 1773 masterpiece. And because She Stoops to Conquer's witty and intelligent heroine, Kate, outsmarts her would-be suitor Marlow, it's even more tempting to see it as having shades of The Taming of the Shrew, only without the difficult bits for modern audiences.

In 1992 Northern Broadsides, the Halifax-based theatre company founded by Barrie Rutter, staged its first production, Richard III. Rutter (b 1946), an established actor who had worked with some of the most distinguished names in theatre such as Jonathan Miller, Terry Hands, Peter Hall and Trevor Nunn, directed the show and also played the title role. However, what made this production unique was that it was performed entirely by a cast speaking with northern voices - note, not northern accents, more of which later.