Previous planning permission for use of the helipad was between 8am and 6pm, or from dawn to dusk, whichever is the shorter.
This shows the mindset in the UK.....NIMBY's rule!
As Helicopter EMS is done 24/7 in other places in the World....perhaps the UK CAA/JAA/EASA or whatever the current flavour today is....would find a way to facilitate that in the UK?
But as we all know...."If it was good enough for Wellington...."