Before the middleages, this dragons were widespread across europe.
But between the 7th and 14th century a clan of dragonlayer (the holy Georg was one) decimate 92% of the population. After this the dragons change in the mind of humans.
Paolo Uccelo was one of the last that remember how dragons realy looks like.[link]
He lived near a nest of the italian subspecies Eurovenator anglicus magnificus, known for their wonderful wings.
Today we have 240-250 specimens with 8 on the british islands (because of the many humans it's hard to bring them back)
with 6m in length it's longer than Uxuldraco but it's a worse flyer.