I think the UK NG problems will soom begin replicating in other countries. IMO NG situation has been underestimated because of the relatively huge amounts we have as known reserves - about 5000 tcf, which translates in the tranquilating 50 years of consumption. This reserves figure though underestimates the following problems (in addition to your points):

  1. 70% of these reserves are in 3 countries - Russia, Qatar and Iran. This is potentialy devastating for the security of supplies and for our ability to bring them online quickly enough. A single blast in Moscow and the whole West Europe could be frozen.
  2. The cliff NG production falls after it reaches its peak production is making it much more harder for the local economies to accomodate. I hardly imagine what would happen if we went to NG on large scale lured by the Russian reserve figures and their fields start to decline.
  3. The increasing usage of NG as substitute for oil, where NG is abundant locally
  4. Our only significant source of conservation on world scale is from NG fired plants, and we don't really have anything to replace them with, except coal.

Overall the prognosys is for a calm weather on average. with occasional storms, hurricanes and tornados here and there.
Everybody forgets the Belgian gas explosion which disappeared from the news very quickly. Despite official enquiries reports etc., no clear explanation for the ingintion / explosion has been provided.

The whole of the European gas pipeline network must be evry vulnerable to determined efforts to damage it.

The physical security of pipes, storage depots (remember Buncefield) seems to rate very low on future plans... although they talk of little else with nuclear power.

JESS is just a bunch of civil servants coevering their backsides.