Lancasters and Vulcan take to skies over Lincoln

The world's only two flying Lancasters have been united with a Vulcan bomber in a formation flight described as a "never-to-be-repeated" event.

The three aircraft, made by British manufacturer Avro, took off from RAF Waddington at about 13:30 BST.

They flew together over nearby Canwick Hill in Lincoln before heading on to RAF Marham in Norfolk.