I feel your pain. Now that the weather is improving, the racing snakes are beginning to commute on their racier bikes. Which seems to be resulting in me being undertaken.
Last week I got huffed at by a chap who I nearly took out when I dodged left around a pothole. Fair play - my obs were slack - I didn't check all the way backwards to my left before I swerved. I'd planned on a smooth move to the offside, but a car approaching rapidly made me change my mind with little time left and I dodged to the nearside with only a bare glance to the space directly next to me. Heard the universal call of a surprised cyclist 'whooooooaa' and at the next TLs he had a minor huff and puff at me, saying it was a good thing that one of us knew how to cycle properly, otherwise we'd have crashed.
Considering I didn't see him when I glanced left, I'd say he was half-wheeling me on the nearside. If he hadn't have been switched on, I'd have likely taken out his front wheel. He'd definitely have gone for a lie down and I might have joined him.