According to Ponden Mill, the standard UK bed sizes are
Single: 3′ x 6′ 3” (36” x 75”)
Double: 4′ 6” x 6′ 3” (54” x 75”)
King Size: 5′ x 6′ 6” (60” x 78”)
(‘ = feet, ” = inches)

My bed is 4′ x 5’ 10” (48” x 70”). Is this a queen size? No wonder I never got standard size bedding to fit!