What is this bird of prey in Wales?

Hi, in September (ik this post's subject is out of date) We were near Gigrin Farm (Red Kite Feeding Station in Mid Wales), Where we came across a very large bird of prey, Before I was convinced it was a Red Kite, however I looked at the tail, It wasn't forked. I actually do I have a photo of it, (just a little glimpse)

?

Before you say this is a crane/swan/long necked bird native to the UK. The tail wasn't "acting" as the head.