Regan is serving the final game of a three-match ban and is unavailable.
With Rovers having the weekend off due to their FA Cup exit, the break has enabled members of the squad to recover from injury and return to full fitness to give Trollope a boost.
Midfielder Charlie Reece has been troubled with injury recently but has recovered and is in contention to return to the Pirates squad while striker Will Hoskins has suffered no recurrence of an ankle injury in his recent substitute appearances and is pushing for a starting place.
Stuart Campbell is OK after an ankle injury while Byron Anthony returns from a one-match ban.
Source: PA
Source: PA