Remnants of the two major storms, which have devastated the US and the Caribbean, will leave Britons facing winds of up to 85mph towards the end of the weekend and into next week, the Met Office has predicted.
The pair are expected to meet and join in the mid-Atlantic at the end of the week.
Forecasters said the two weather systems will have weakened by the time they enter British latitudes, but their remnants will still contain tropical air, which can influence weather in the north-east Atantic, including the UK.
Yesterday, meteorologists believed Lee was reducing in strength, but this afternoon Lee strengthened to become the fifth major hurricane of the 2017 Atlantic hurricane season, the US National Hurricane Center (NHC) said.
Lee, now a Category 3 hurricane on the five-step Saffir-Simpson scale, was about 1,765 miles (2845 km) west of the Azores, packing maximum sustained winds of 115 miles per hour (185 km per hour), the NHC said.
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It added: ”Slow weakening is forecast during the next 48 hours.”
Weather maps by WX Charts show northern Scotland being hit by 85mph winds, northern England facing 65mph winds and the South and Midlands having to deal with more than 40mph gale-force winds.
The Met Office has not issued any weather warnings yet, but is considering putting out severe weather warnings and has told people to keep looking at the forecast.
Both hurricanes are taking a curved track across the North Atlantic towards the UK, but meteorologists have warned they could veer from the path at any moment and take a more direct approach towards central Britain.