Can anybody help please with an idea of my cat breed?

I took in this gorgeous little girl a few months ago, I keep British short hair cats but rescued her as her owners just wanted her gone asap! She's a very lovely cat, she has the tail markings and coat colour of my BSH girls but a different face shape!
I've not kept cats for very long so my knowledge on types of breed is poor, and I understand she'll likely be a cross between breeds, but wanted to get a few opinions please!

here's another picture

another picture

Oh, she is pretty. I'm not sure about breeds but I guess her coat colour would be known as blue.

@StefanZ  will know. I'm sure @MServant  would like to see her picture too.

Have you seen our thread for blue cats?

http://www.thecatsite.com/t/274478/post-pictures-of-your-precious-blue-gray-maltese-cats-here

She is a korat look alike, not russian blue, as seen on the face shape. IF real thing, she is Pet quality.  Not least, because her  eyes although greenish, arent really clear cut green (unless they are better in reality - I know photos arent always fair to that green).  Korats green eyes are as intensive as RB, although the nuance is somewhat diffrerent.

Ooooh,  pretty cat!      Thank you for alerting me to this thread @Norachan  .

I agree with StefanZ, she definitely has that heart shape face look of a Korat, lovely colouring, and her fur looks beautifully dense.  The Korat is a very rare breed so it is unlikely she is purebred, but even to have a likeness is very special.  Does she have the silver tips to her fur @Abbie1711   or is it more of a flat blue colour?   

Thankyou for the responses, I'd been told korat a few times but it's not a breed I'm familiar of. If I'm right in what I've read the eyes of korats don't turn green until they are 2-4 years as they are slow to mature. Shadow is about 8 months old so still a kitten.
Her fur if I part it, is lighter underneath. Its not as thick as my BSH cats and quite fine. She has a very slender tail and an 'athletic' build as the vet says.
From what I've read the korat is a rare breed, so unlikely to be pure I know, so does she show any characteristics of what she could be crossed with?
Thankyou everyone

Korat, like Russian Blue, is a naturally occuring type of cat.  The pedigree Korat cats will have a known genetic history going back several generations where their families show all the desired features of the Korat breed.  It is possible to have a non pedigree cat without Korat pedigree heritage showing many or all of the features just as there can with a Russian Blue.  Rare and precious whether the cat has pedigree registered genetic history or not.  

Here is the link to the TICA Korat information and breed standards.  They give a nice description of what the fur should be like as well as the head shape and general body type.  It would be interesting to hear how you think your cat fits with their description.     

http://www.tica.org/public/breeds/kt/intro.php

Without any pedigree papers or known history your cat can be called Maltese as this name is used for all blue or mostly blue cats which do not have a specific pedigree.  Maltese cat sounds very fitting for such a pretty cat.