200tdi sever oil leak

driving back to wiltshire yesterday with my 200tdi in my s3 all seemed well until we landed, i looked in the engine bay and oil was everywhere , but the only sings of the oil leak is around the rocker cover / cyclone breather and i just wondered if it could leak so much oil from there / if a blocked breather pipe could cause this , it was breathing from the rocker case but nothing from the sump breather pipe , havent had a chance to look futher into this will be tomorrow just wondered if any of you guys had an idea of where to look !