The Conference South side had much the better of the first half without managing to score.
Ironically, it was during Cray's best spell of the game that they fell behind. Welling gave the ball away, Cray gave it straight back and former Thamesmead forward Theo Fairweather-Johnson supplied the pass for right-back Connor McLaren to fire home.
That was in the 71st minute, and although Leigh Bremner immediately hit a post at the other end it was as close as the Wands would come to saving the day.
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