
Hi,
I don't know of any Clubs that do both Agility and Obedience in North London but I do know of and Agility Club that runs classes on a Tuesday evening.
You can't really start agility training until your dog is around 2 years old in terms of jumping but you can teach the weave poles, tunnels etc the equipment that dosen't require your dog to jump.
I think you would really enjoy Agility but you do need a certain level of Obedience in terms of control so you are best to start with Obedience classes and then move on to Agility.
I have PM you the details of the Agility Club.
Goodluck and have fun!