Why was that a scrum after Roberts block down ?

Waqaniburotukula dives over the top of the following breakdown, and is penalised accordingly

Welsh scrum on the Fijian 5

Volavola blocked down by Jamie Roberts

They carry and look to force the Welsh back

Fiji just about cling on to their own LO ball

Owens takes Warburton's offload, but steps in touch

Charteris collects and ships the ball to Warburton, who takes off down the touchline

Cmon Fiji

Touch found