Gravesend boss Liam Daish has made Southend winger Joel Ledgister and former Charlton striker Alex Varney his first transfer-window signings. Ledgister, 18, joins Fleet on a month's loan following a similar spell at Conference South side Lewes earlier this season.
Meanwhile, Varney arrives at Stonebridge Road after being released by Charlton at the end of last season.
The 22-year-old did not make a first-team appearance for the Addicks.