Two US military planes left vapour trails in the skies above Norfolk as they jetted off over the North Sea and up the coast. 

A KC-135 Stratotanker and a KC-10A Extender, both refuelling tanker aircraft, left Mildenhall airbase in Suffolk at about 7am on Wednesday, January 11, before making their way out over the North Sea.

A nurse in Gorleston was getting ready for work when she spotted them flying over her house.

Eastern Daily Press: Vapour trails made by US Air Force planes could be seen over GorlestonVapour trails made by US Air Force planes could be seen over Gorleston (Image: Julie Ryder)

Julie Ryde, from Cliff Hill, said: "I was having a coffee in bed before my busy shift as a nurse at the James Paget University Hospital.

"I looked out of the window and saw six vapour trails. They were high up and heading in from over the sea & up the harbour and flew right over my house."

Eastern Daily Press: The 100th Air Refueling Wing aircrafts were likely on an exercise or training missionThe 100th Air Refueling Wing aircrafts were likely on an exercise or training mission (Image: US Air Force)

According to Flight Radar, the two planes flew out over the North Sea before circling back and heading over the north Norfolk coast.

The pair continued to travel north over Yorkshire and into Scotland before heading west over Ben Nevis and across the Atlantic Ocean.

It is unknown where the final destination was.

A spokesman for the United States Air Force at RAF Mildenhall said: "The 100th Air Refueling Wing provides the critical air refuelling "bridge" that allows the Expeditionary Air Force to deploy around the globe on a moment's notice.

"The Wing’s constant participation in exercises and training increases the overall readiness and interoperability of U.S. forces across all domains."