No aircraft
No pilots
No low flying
Pretty much this.
Our wonderful government instituted the complete demise of around 50% of the jets who regularly frequented England and Wales. They've also sacked a bunch of pilots as well via cuts and redundancy. The poor effect all of this has had on morale is driving even more to the exits.
With limited resources and an emphasis on ML ops in Afghanistan (as was in Libya also) it is unsurprising that hardly any low flying occurs now.
Eventually we will be relying solely on TV, pictures and the two or so official air shows the RAF are allowed, per year, to convince the UK taxpayer that we even fly aircraft in an offensive role. Like NZ, eventually the number of transports/helos will outnumber the jets and we all know what happened to the latter....
I think its about time some hard-nosed military folk became politicians, got into power and sorted this bunch out once and for all.