Willow ID please

I suspect it's viminalis but unsure if it's a hybrid of some sort. I manage four willow short rotation coppices for phytoremediation of landfill leachate and this ones seems to be doing really well. I've looked and looked but can't seem to ID one with such bright yellow stems.

 

Impossible to say for sure.
There are several Salix with yellow new twigs.

A possibility...Salix rubens Basfordiana.

https://www.google.co.uk/search?q=Salix+x+rubens+'Basfordiana'.&rlz=1C1GNAM_en-GBGB687GB687&biw=1920&bih=967&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjAm7LMn7zMAhWBJMAKHRkTAY8Q_AUIBygB

http://www.gapphotos.com/imagedetails.asp?imageno=324672

 

Thanks Silver surfer, much appreciated. This should help.