Not taking into concideration the weather conditions of some certain years , particularly in the dark ages following the fall of Roman britain the weather was conciderably better than it is today, grapes were grown in britian, the climate acording to the experts who know the enviromental history of an area, state that the weather was 4 degrees warmer at this time, Hence producing better and more food. Also wine imports from britain to france were making the economy great. However having said that i am convinced that the fall of the Roman empire put the human race back 1000 years technology wise and the coming middle age disasterous replacement fueldal system along with lack of hygenic water and lots of descise could have been avoided if the emire had survived.