Black cab SK11 ZFB appears to have some issues and is probably best avoided, though if anyone sees it around if you could drop me a note of its permit number I'll append it to my complaint.
I'd just gone over the north MMW exit junction, picking a large gap in traffic from Teviot Place to merge into. There were parked cars and so on on Forrest Road so only enough width for one column of traffic, with a bus a few things ahead of me which no-one was getting past, and a red light beyond the bus. It must have been a #2 as it went down Candlemaker Row, whilst I checked behind me and moved right ready to head down Chambers St. As I waited for a gap in the oncoming traffic a voice shouted something along the lines of "see you fornicating Onanists oan yir bikes" as the taxi sped past. Intrigued, I decided to follow, seeing as the light at the Missoni was red and there was sufficient oncoming traffic to prevent me from turning for a bit. Just as I hove to two vehicles behind the taxi it suddenly U-turned to head back south, allowing me to determine that there was no visible passenger. I followed, one car behind, but was held back by pedestrians crossing at the museum's pelican. The light to South bridge was red so the offending vehicle swerved intemperately down and along Guthrie Street, with some considerable squealing and revving as it turned west at the bottom. It shot up Candlemaker Row some distance ahead of me, so I doubled back and went up Victoria Street to see if it was heading back up G4Br as had been its original intent, but could not see it when I emerged.