I'm from Aberdare, so not too far from you. Exercise-wise, all dogs are different and all people have different ideas but my preference is at that age at least a mile on the lead once a day and whenever you get 10 minutes spare to let them run free on the local fields, that's a bonus. Little and often at that age, no need to overdo them as they've got years of work in front of them. Mine started on the rabbits at around the 12 month mark seriously, but had chased quite a few around patches of cover before that. Hope this helps!
David