Watch free-to-view highlights from Tuesday night's triumph under the lights.
Albion were forced to wait until the second half before making the breakthrough as Brandon Thomas-Asante converted from the spot and Grady Diangana, who'd won the penalty for the first goal, was in the right place to tap in the second following tenacious work by Nathaniel Chalobah to create the chance.
Catch the WBA TV footage in the video below.