Saracens’ Brad Barritt says England rugby flag will fly high in Europe

• Saracens beat Northampton 12-6 to make it four wins from four• Barritt sure challenge in European Champions Cup will be strongThe rest of the continent will hardly be quaking in their boots – still less the rest of the world – but Saracens, virtually England’s sole standard-bearer in the latter stages of Europe these past four years, head into the latest campaign after four wins from four. More specifically, they limbered up for Toulouse next Saturday with a precious win – impressive in its ruthlessness if far from inspiring in its imagination.Still, it was the kind of win to stiffen the sin…