St David’s Hall Monday 4 May 8pm ONE of Britain’s best-loved comedians, Paul Merton will bring his sharp improvisational wit to St David’s Hall for a special night of comedy on Monday 4 May.  But he’s not coming alone! Sharing the stage with Merton will be his Impro Chums Richard Vranch, Lee Simpson, Mike McShane. Plus, Merton’s wife Suki Webster will also be joining him as the quintet pit their wits against each other to see who’s got the quickest,…