Undertaking isn’t strictly speaking illegal is it though, just frowned on. Of course using a bus lane to do it though is though I’d have thunked (unless he was on a shout, which he clearly wasn’t)…
Differentiating between when it is and isn’t appropriate to apply that “advanced Driver training” is a toughy no doubt…
The thing is of course that very few “Regular” MET probably roam about London in Range Rovers wearing **** sunglasses do they?
I expect there was a “proper” reason he probably didn’t want to be held up for too long at a set of lights by some Mary on a push bike; i.e. the longer he’s sat there, the more chance someone will try to nab the SA80 he left unsecured in the boot while nipping out for a Latte and copy of Razzle…
Personally I wouldn’t monkey with a Rozzer who shows all the key signs of Really, Really wishing he was Andy McNab…