I realise that many will be of like mind...but is anyone of sound mind surprised that we dont practice URBAN LOW FLYING?
Of course we'd all like to train as we fight, but we need - in peacetime - to balance risk with training value!
What's the alternative? Why not use real troops as targets....or get the infantry to bayonet cattle, or maybe our submarines could just sit in the channel, 'practicing' by sending 'the odd' merchant man to the sea bed. Workinghard, even if the training would be valuable you have to be sensible.
Moreover, what weapons could a FJ deliver at LL in the urban environment. Lots can be achieved from ML, but low level, with oblique trajectories in what is the most 'colateral intense' target area? Let's have a pause for (sound minded) thought.
As for rotary aircrew i'm sure urban low flying would be invaluable, but that doesn't mean that on balance it's worth the risk. Which, in turn, doesn't come close to meaning they'd be allowed to do it.