Buying a puppy in the UK

I just wanted to know the best place to go to get the kind of dog I want as I am new to the UK and my husband hasn't ever had a dog before so he doesn't know where to go either.

I'd start here http://www.dogpages.org.uk/ 

this site was most helpful when we were looking for a dog. 

Also, when you look for a dog to adopt, sometimes, the dog chooses you so be prepared for that too!