King's Lynn Town surrendered their top spot after their game at bottom-of-the-table Gosport Borough was postponed owing to a waterlogged pitch.
Areas of Borough's Privett Park pitch were under water and after a 10.15am inspection and with more heavy rain in the forecast, there was little option left but to call off the game.
Slough Town are now top of the table, on goal difference, after a goalless draw at fellow promotion hopefuls Kettering Town, who are fourth.
Weymouth are in third place – on goal difference - after a 2-1 win at St Ives Town.
Those positions are likely to change again on Tuesday night when there is a full schedule of games.
The Linnets entertain Bishops Stortford, who are currently 17th in the table, while Slough Town are at home to Gosport Borough.
Kettering Town travel to Redditch while fifth-placed Hereford United, 3-0 winners over Kings Langley on Saturday, are at Tiverton Town.
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