Hi there - I can really recommend Dom Makin AKA The Dogfather!!
I know him personally so can vouch for his caring manner and professionalism. He really loves the dogs he looks after (including a few spaniels) and has many clients in the Nappy Valley area.
He provides dog walking, and boarding in his home as well as services to check on and feed cats in their own home. From what I know he'll walk dogs on their local common on request, otherwise he usually takes up to four in his estate off to Wimbledon or Richmond Parks for a really good romp around. I has seen him out with his charges and they're always very happy!
his website is:
http://thedogfatheruk.com/
I have a pooch myself so I know how daunting it is. I wouldn't hesitate to send my dog to Dom.