After a week off the Celtic League returns tonight with all four provincesin action. League Leaders Ulster are at home to Edinburgh and welcome IrishInternational Tyron Howe back to wing. The Northern Province will be hoping Connacht can get a result a Llanelli,as the Welsh side lie just one point behind them. Leinster are also at home, Gary Ella`s men entertain the Borders at Donnybrook. The Lions pack will be boosted by the return of Peter Coyle and Aidan McCullen.