Britain has an equable climate which means that extreme weather is rare.

Britain has different seasons - spring, summer, autumn, winter.

Britain has different weather North, South, East and West as follows:
NW - cool summers, mild winters, heavy rain
NE - cool summers, cool winters, relatively dry all year
SE - warm summers, cold winters, some rain all year especially summer
SW - warm summers, mild winters, rain all year especially winter

The reason for Britain's weather being different North, South, East and West is because different air masses come from each direction as follows:
North - Arctic very cold
East - Continental from Europe and Asia
South - Tropical warm
West - Maritime air has crossed Atlantic bringing wet weather