Has anyone ever brought a puppy to UK under pet travel scheme? I know the rules, just not sure if I have to wait for puppy to be 6 months old to ring her, or there are some exceptions?

The puppy wouldn't be able to enter the UK until it was 10 months old!

If you do a search on Pet Passports you should find several threads referring to this.
:)

If you type 'pet passport' into the search facility in the top right hand corner of the forum page, you will gain access to many previous posts on this subject by members who have imported dogs.