Wow, so many comments, thank you all.
Update!
The citizens advice bureau have been in touch with trading standards and they have confirmed i have a case!!
There are a few formalities that need sorting, but i am going to crack on with it all. The breeder has been in touch, called me an idiot and that i should save my money - Makes me want to get him even more!!!
So now im collecting all of my evidence before sending him a letter - outlining what i want from him (the difference of a KC registered pup and not, approx £300) and giving him a date to resolve.
If he says no (which im hoping) i will then take him to the small claims court, where if the judge rules in my favor It will be FACT and i can legally publish my win!!
To me, its not rocket, i saw an advert for a KC registered pup, paid money for this. But the pup wasnt registered. Even if the pup gets registered now (which i think he has done over the past few days) at the time, it was not what it 'said on the tin!'