The Second World War brought many great players to Sudbury as Military Service inadvertently centred rugby talent in London. Perhaps the most notable of these were the great Welsh internationals Vivian Jenkins and Harry Bowcott who later became President of the Welsh Rugby Union.
This period saw the Club graduate to being one of the major Rugby Union forces in England with an ever-increasing number of fixtures to fulfil.
The increased workload seemed to pay dividends, however, with many players gaining international recognition - great England players such as the aforementioned Pat Sykes (7 caps), Ted Woodward (15 caps, including 6 tries), Bob Stirling (18 caps), Richard Sharp (14 caps), Don Rutherford (14 caps and later RFU Technical Director) and Peter Yarranton (5 caps and 1991 RFU President). The Club's 90th Birthday Present in 1956/57 was the rare honour of playing a full International XV at Twickenham, the home of English Rugby.