 The Thames sub union, which had remained affiliated to the ARFU up until then, joined the TVRFU in 1951.Thames Valley won the NPC 3rd division in 1988, 1990 and 1995, and in 2018 the Swampfoxes won their first Meads Cup

Thames Valley has never held the Ranfurly Shield.They have challenged for the shield unsuccessfully on 14 occasions; their most recent challenge was a 68–0 loss to Counties Manukau.