Thomas will be up against Charlton Athletic's Lee Bowyer, Paul Cook of Wigan Athletic, and Cardiff City boss Neil Harris with the winner announced on brentfordfc.com tomorrow morning.
Following the three-month break, The Bees returned to record three consecutive wins during the month without conceding. First up, Said Benrhama and Emiliano Marcondes struck late in a 2-0 derby victory over Fulham at Craven Cottage before fellow promotion rivals West Bromwich Albion were beaten by a single Ollie Watkins strike at Griffin Park. The month was rounded off with a comfortable 3-0 victory over Reading at The Madejski Stadium; Bryan Mbeumo, Josh Dasilva, and Joel Valencia on target.
This is the third time this season's London Football Awards Manager of the Month has been up for the prize, having missed out in January and October last year.