London Welsh’s captain Carl Kirwan puts on brave face after Saracens rout

• Former oil rig worker admits Irish match is now crucial• Match report: Saracens 78-7 London WelshCarl Kirwan, the London Welsh captain, once had a spell as a scaffolder on a North Sea oil rig. After his side had been submerged beneath wave after wave of Saracens attacks the flanker mused: “A year in the North Sea was probably easier than 80 minutes out there.”For the Premiership’s bottom club a spot of gallows humour did not go amiss. This is the season of excess and Saracens had gorged themselves on 11 tries to inflict the worst defeat yet on Welsh in this painful return to the top table. O…