Thanks for all the advice people.
I hate cats, I hate their sneaky feline ways, I hate the sh1t they leave in my garden and the corpses of all the birds that they kill Plus I'm allergic to the rapacious little buggers
The SO was seriously thinking about greyhounds but I don't really like them that much so that's out. In terms of breeds I really like Springers but I know they're pretty crazy, so I think we're going the mutt route. At the mo the Missus is a stay at home mum so there'll be somebody around and they'll get a good walk on the way to school in the morning/lunchtime/afternoon