Centre-half Phillips has been sidelined for six weeks with a knee injury but has trained all week and should be in contention, although he will probably have to settle for a place on the bench after the Bees held leaders Leeds to a goalless draw last weekend.
Winger Weston has missed three games with a hamstring injury but is also expected to travel.
Tottenham youngster John Bostock has extended his loan spell for a second month and will start.
Fellow loanees, goalkeeper Wojciech Szczesny and defender Pim Balkestein, play the last game of their month-long spells but Scott will try to extend their stays.
Regular keeper Nikki Bull is the only long-term absentee after a shoulder operation.