This is "The Empress" more formally known as Icebreaker Golden Charm. 

She does her best to live up to her nickname of the Blonde Bombshell and is a constant source of both amusement and frustration - typical TM! 

Although one of the youngest Tibetan Mastiff puppies at Crufts 2014 she showed her socks off and, under breed judge Barry Blunden, was awarded Best Puppy in Breed.

She has since gone on to greater things and some of her achievements are listed (along with those of her brother) on the Show Results page.