I beep my horn, or try and slip past. I usually give the driver in front a nice hand gesture when he looks in his mirror as well.
I know one land, from the area of Bridgend, who was riding his bike and pulled up at a set of traffic lights. The woman, who was turning right, had parked right up agains the raillings so he could not get passed (as bikes do) She was busy talking on her phone when they went green. After applying some slap and talking away on the phone the lights turned red. This lad jumped off his bike and opened her door (she must have been in shock) grabbed her mobile and tested the phones durability by tossing it into the middle of the oncomming road. Jumped on his bike and ran the red!!
Bet she will take more care from now on!!