League One top scorer Lee Barnard struck either side of the interval to take his tally to the season for 12 and secure all three points, despite Anthony Grant's own goal ensuring the high-flying Pirates at least made a game of it in the final 30 minutes.
Trollope said: "Everyone is disappointed because we had a two-week break and have trained exceptionally well.
"We were fully prepared for this match but our start wasn't good enough and that's cost us the game. We made a lot of bad decisions with the ball early on and we didn't pass and move as we can.
"We only switched on when we were two down. We stepped it up and got one back but missed our chances to get the second."