bench in the 68th minute of the 40–9 away loss to England two weeks later. He then started the following match against Italy and kicked two conversions as Wales won 30–23, before again being an unused replacement for the final match against France, which France won 36–16. The following season, Williams was still suffering from a shoulder injury at the start of the 2013 Six Nations Under 20s Championship, but joined up with the squad once he had recovered. He missed Wales' 17–15 win over Ireland in the opening match, but was fit enough to make an appearance off the bench in the second game, a 27–13 away win over France, before returning to the starting line-up at full-back for the final three matches. Victories over Italy and Scotland meant the final match at home to England served as a title decider, with Wales playing for a Grand Slam; however, England won 28–15 to take the title on points difference. At the end of the 2012–13 season, Williams was named in the Wales squad for the 2013 IRB Junior World Championship. He was left out of the opening match, a 42–3 win over Samoa, before starting at full-back in the 26–21 win over Scotland four days later. He was named on the bench for the final pool match against Argentina, and came on for Hallam Amos in the 59th minute as Wales won 25–20 to top the group and qualify for the semi-finals. Williams again started at full-back in the semi-final against defending champions South Africa, and played a part in both of Wales' tries; for the first, a deft pass allowed captain Ellis Jenkins to crash over and give Wales an 11–7 lead. South Africa replied almost immediately, and had a six-point lead going into the final minute, when Williams broke four tackles to put Wales in good field position for Sam Davies to set up a try for wing Ashley Evans, which Davies then converted to give Wales an 18–17 win. Williams was again picked at full-back for the final against England on 23 June, but England won the match and the title. Williams received his first call-up to the Wales senior team for the match against Tonga during the 2013 Autumn internationals. He was named on the bench for the game, but did not make an appearance. In 2014, following an extended run in the Scarlets team