Cylcling down King Street doing about 25mph and some mad woman in her BMW with the usual mobile phone glued to her ear came straight out of a side road without even looking. I shouted at her and slammed on the brakes and managed to stop about 2 inches from her door. Initially she was very apologetic but then started screaming at me to watch where I was going. A couple of PCSO's heard the commotion and immediately started castigating me for riding too fast. Luckily a couple of peds stepped in and told them what had happened. They then let the woman continue without even bollicking her for driving without due care and attention etc.