Thanks for the advice
Im not sure what kind of coat she has to be honest... the puppy colours on her head are growing out and the blonde that is coming through feels quite silky, but the fur on her back is still jet black and feels quite cottony so I dont know.
Im at work at the moment so I have asked my mum to take her to the groomers and see if they can work the mats out then cut the hair on her tummy and under arms quite short.
She dosnt mind me brushing her back I think its because when Im doing her tummy or front legs she can see the comb and just wants to kill it LOL.