Snow Buntings?

We keep seeing flocks of small whiteish birds flying around.....they look white while in flight and slightly brownish when at rest....never seen them before this week and now a flock is flying about here quite often....in the surrounding fields and in our front paddock.

I wasn't sure what they were, but on further invesigation I think they are Snow Buntings.....

Anyone know for sure? I think I will write to John Acorn and ask him.