The story is in METRO:
Britain’s coldest May in more than 300 years will deliver 50mph gales, 5cm (2in) of rain and flooding.
Central England temperatures so far this month average 8.6C, 1.6C below normal.
The last time May was colder was in 1698, at 8.5C over the whole month.
After studying 2,800-year-old core samples from a European lake, an international team of scientists found that weakening solar activity sparked an abrupt period of cooling that lasted for about 200 years. The cooling took place over an 8 year period. We may be on the cusp of 200 more years of cooling. Cooling which is going to take place rapidly. Stay tuned!