I believe that this question has multiple questions and the answer should be;The warm water of the current warms the air above it. Prevailing winds blow the warm air toward shore.
The gulf stream current carries warm water in the Atlantic ocean to the northern Europe. Winds from the Arctic cools the surface water in the north arctic, making it more salty. Essentially, water with a high level of salt drops easily to the ocean floors. Cold water travelling towards equator warms slowly and vast oceanic current found on the surface of the Atlantic ensures England's mild winters.