Is it time to start calling out bad cyclists?

@ NH - This also happens way too often on my commute, but I now allow for that and will either drop back and let them crawl ahead or speed up to overtake safely, or leave a wider left-hand gap to allow for two lane cycling til I've cleared the bus then safely move back into the left-hand lane.

Alternative solution: Ride faster. Then nobody ever undertaking you again. And if dey do, you give falcon-kidney-punch, bike ninja style. Make dem regret it. Because riding bike is like a finger, pointing to da moon... DON'T LOOK AT DA FINGER!! Or you will miss all dat heavenly glory.