United, relegated from the Premiership on the final day of last season, went ahead after nine minutes when Arbroath gave the ball away to former Preston and Motherwell forward Moult, who sent Glenn Middleton through to score.

Moult was the architect again as United doubled their lead in the 25th minute, slipping Mathew Cudjoe through to coolly finish.

Craig Sibbald rattled the crossbar before he got on the scoresheet eight minutes before half-time after another Moult assist.

And Moult got in on the act in first-half stoppage time with a powerful finish to put the visitors 4-0 up at the break.

United could have had another in the second half but Scott McMann’s drive clipped a post.