UK, France and western Europe more generally getting a bit colder isnt too big an issue with temperatures rising anyway, the more concerning part of it is that it will make the climate much drier and affect what crops can be grown.
IIRC it’s more about the extremes the UK will end up with - hotter and longer hot spells, colder and longer cold spells, longer deluges of rain, longer periods of drought, etc.
UK, France and western Europe more generally getting a bit colder isnt too big an issue with temperatures rising anyway, the more concerning part of it is that it will make the climate much drier and affect what crops can be grown.
IIRC it’s more about the extremes the UK will end up with - hotter and longer hot spells, colder and longer cold spells, longer deluges of rain, longer periods of drought, etc.
edit: Oh and I think there was concern about the pattern of rain in western Africa shifting further
northsouth resulting in mass famines in densely populated areas. https://climate.mit.edu/ask-mit/what-would-happen-if-atlantic-meridional-overturning-circulation-amoc-collapses-how-likely