Dan Biggar’s oxygen chamber regime to breathe new life into Wales

• Fly-half in early return from injury after 10 days in oxygen chamber • Biggar returns to face Ireland in Six Nations Test at DublinDan Biggar has clambered out of an oxygen chamber to try to breathe life into Wales’s Six Nations title challenge. The Northampton-bound fly-half has made an earlier than expected return from a shoulder injury to face Ireland in Dublin on Saturday.Biggar will be up against Johnny Sexton, his Lions colleague in New Zealand last summer, and is the only member of Wales’s back division who does not have a link with the Scarlets. Five of the other six play for the reg…