Westminster Council clamping down on cyclists...

A council determined to make them obey the Highway Code is to deploy enforcers in a hunt for so-called “Lycra louts” as they whizz through red lights** or ride listening to iPods**.

from highway code:

148

Safe driving and riding needs concentration.
Avoid distractions when driving or riding such as

[*]loud music (this may mask other sounds)

but this is not preceded by a** MUST **so it is not law so how can anyone be targetted for it?