My Dad brewed the Birkby earlier this year and I obviously had to try some from the keg to help him out
It was a nice smooth malty bitter with minimal hop flavour
I brewed the Colne Valley at a similar time, and have to say that we both preferred the CVB

. It just had the perfect balance of malt and hop flavour
The only slight question mark when comparing the two, was that my Dad steeped the supplied hop tea bag for 10mins and I boiled mine for 10mins
MB