It was a difficult day for Rovers as league leaders Luton Town turned on the style at Kenilworth Road.
After a tight opening half, the home side showed their class as goals from Danny Hylton, Kazenga LuaLua and Luke Berry added to their first-half opener from Pelly-Ruddock Mpanzu and continued the Hatters' impressive run which sees them still unbeaten at home all season.