WALES boss Richard Whiffin hailed their stunning comeback win against Italy as the perfect preparation for the World Rugby U20 Championship.

The Welsh youngsters finished the Six Nations as they started, beating the visitors 27-15 at Cardiff Arms Park.

Wales finished fifth in the table thanks to wins against Scotland and Italy, who looked set to leave with the spoils when they led 15-0 after dominating the first half thanks to their formidable scrum.

Head coach Whiffin had been forced to field a much-changed side due to injuries but they rallied to score 27 unanswered points after the break.

Harry Thomas, Harry Beddall, Kodi Stone and Matty Young went over in a performance that gives food for thought ahead of the global tournament in South Africa this summer.

"It sets us up well for World Cup prep later in the year. The pleasing thing is that we used 30 plus players in the tournament and new guys came in against Italy and really put their hands up.”

Six Dragons prospects featured in the Six Nations with centre Harri Ackerman unable to captain the side against the Italians after a leg break that rules him out of the World Rugby U20 Championship.

He was skipper because Rodney Parade teammate Ryan Woodman has a hand injury, with the lock/blindside hoping to feature in South Africa.

Wings Walker Price and Harry Rees-Weldon sat out the Six Nations finale with full-back Huw Anderson shifting to the flank, lock Nick Thomas starting and loosehead Jordan Morris coming off the bench.

It was one-way traffic early on, with the Italian scrum well on top.

Star tighthead Marcos Gallorini and a penalty try meant they were in control but then Wales upped the pace.

Hooker Thomas went over from a lineout, captain Beddall did the same and then wing Stone scored a lovely try out wide.

Man of the match Morgan Morse went on the charge to set up the bonus-point score for Young before fly-half Harri Wilde sealed the win with a late penalty.

"We spoke [at half-time] that Italy had thrown everything at us and their scrum was their way into the game,” said Whiffin.

"We wanted a focus on keeping high ball in play time and we showed that with the second half - they conceded and we got over the line.”

England, who had been denied a chance for a grand slam by a late Irish try to draw in round four, secured the title with a stunning win in France.

The visitors won a classic in Pau 45-31, with both sides likely to be serious contenders for glory at the World Rugby U20 Championships. Scotland suffered a fifth straight loss when beaten 36-0 by Ireland.