Hi Robert
It sounds to me more like the classic "kuwick" call of a female Tawny Owl. Here's a clip of such a call with the "woohoo" response of the male.
Play this audio clip
brickegickel, XC405575. Accessible at www.xeno-canto.org/405575.
I've not heard a Goshawk call but the one given on the RSPB website sounds like this.
Patrik Åberg, XC27024. Accessible at www.xeno-canto.org/27024.
Feel free to wait for further opinions but I hope this helps in the meantime.
Interesting to hear the different recordings, I would also tend to go for the Owl but am no expert, hope you get a chance for a sighting next time Robert.
I'm no expert either but would also say female Tawny sound although a 2nd recording would be helpful if you get chance. I saw this article on the area and it looks quite likely as they added larger nesting/roosting boxes 3 years ago which attracted species like the T'owl HERE
Well done Robert; it still sounds like a female Tawny to me but see what others think.
It really does not sound like a Goshawk to me, a female Tawny as suggested by others sounds nearer the mark.