I believe that solutions could be found to the end of oil, alternative technologies, re-organisation of things like food supply and power distribution. I beleive that if these are pursued, people in the UK in the next century will be living lives we would find recogniseable, no regression to mud huts.
I don't think any solutions will acutally be found, all the significat time and resources will be spent fighting wars over what oil etc. is left.
It's all fucked