Thanks for the comments. Just joined up to a bird news update site and it paid off straight away.
They were at the bottom of street, in a really busy built up area. I would never have found them!
When I first started my photographic hobby no one ever warned me it could be this obsessive. I even dream about wildlife photography now!
(p.s. if anyone asks, I was ill and not taking pictures!)
happy snapping!
Stu.