The RFU Senior Vase is a rugby union national knockout cup competition in England run by the Rugby Football Union, which has been competed for since the 2006–07 season. It is contested for by teams at level 8 of the English rugby union system, with only 1st XV sides being allowed to enter. The competition is a national one but is split into regions until the semi-finals with the final being held at Twickenham Stadium in London. As of 2018-19 it is the fourth most prestigious national club cup competition in England behind the Premiership Rugby Cup, RFU Championship Cup and RFU Intermediate Cup.