Robbie
Tricky! If a brake is sticking, the hub will run hotter. Carefully, after the problem is noted, check all four wheels for warmth. You're unlikely to have a major hot spot but don't burn yourself.
While it's not impossible, it's unlikely all four wheels have the same problem. I'd be tempted to replace the linings on any axle that was suspected. While I've never had it, low life do make copies of Ferrodo, Mintex and other good names, so buy from somewhere the trade buys from.
