Wingate and Finchley succumbed to their second defeat of the season against Leiston, going down 2-0.
Hosts Leiston took the lead after 17 minutes when Joe Jefford headed home a Connor Hubble corner. The trick was repeat eight minutes before half-time when Adam Tann rose highest to nod in the second.
The Blues host Hampton and Richmond Borough on Saturday.
Edgware Town picked up their second win in four games when the left it late to win 2-1 at Chesham United Reserves on Saturday.
Mahad Nur and George Harrison were the scorers.
The Wares played CB Hounslow United in the Middlesex Premier Cup quarter-final on Wednesday evening.
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