Addison Lee drivers told to defy bus lane law (and to just say SMIDSY)

As far as I can tell, the main problem for TfL is that they appear to be getting no political support on this one.

I just saw this comment on another website:

'Let's not forget it was Boris who ditched the M4 bus lane, as one of his first (few) acts. And why? Because Addison Lee supplied free minicabs to his campaign (as exposed in Private Eye). What a surprise.'
http://cyclelondoncity.blogspot.co.uk/2012/04/addisonlee-theres-every-chance-that.html

It's widely reported that Addison Lee also gave Boris £25,000 for his 2008 campaign and the Conservative Party at least £250,000:

'Last night' John Griffin 'said he had also been to parties hosted by the Prime Minister at Downing Street and at Mr Cameron’s own home, where the PM’s wife Sam and the couple’s children were also present.

The visits to No10 were not revealed in the lists of wealthy backers entertained there, which aides were forced to produce after the cash-for-dinners scandal.'
http://www.mirror.co.uk/news/uk-news/david-cameron-hit-by-new-cash-for-access-797146

Everything I can see online (including TfL) says that driving in bus lanes is a criminal offence for PHVs so I just cannot understand how John Griffin has not been charged with 'encouraging or assisting a crime'. It all seems very weird to me.