The Happy Days Enniskillen International Beckett Festival’s tentacles are spreading ever further throughout Fermanagh. It’s a reach matched by its artistic ambitions, with ever more imaginative site-specific venues and events to match. The Necarne Equestrian Centre in Irvinestown’s abandoned Necarne Castle is a dramatic enough setting – an almost gladiatorial arena – but nothing quite prepares you for the sight that greets you as you enter the dark chasm of its interior. The twenty one musicians of the Ulster Orchestra in wide circle formation is impressive in itself but right in the centre is the towering figure, some ten metres…