Thank you both for the replies.
Unfortunately my wife has never lived in the UK for an extended period of time, so we cannot avail ourselves of the 3(2) registration. As Obie says, the children at the present moment have no claim to British nationality.
Obie - I wanted to clarify a couple of things in your first post. If I read your post correctly, as an EEA national living and working in the UK, my children have the right to join me in the UK notwithstanding the fact that they have not yet confirmed the process of obtaining their Polish passports, correct?
Is there anything I need to do, any steps I need to take, prior to their arrival in England? Do I need to provide a letter to my wife who will be travelling with the children pursuant to which I outline that I am resident and employed in England and that I am an EEA citizen? Or is there a more "official" process for doing so. I just want to make sure that their progress through immigration is as painless as possible given that she will be alone with two young children.
Obviously, once they are in, we can seek to get them a residence card, but I assume that they need to be admitted into the country first.
As for Canada, quoting from the Canadian CIC website (
http://www.cic.gc.ca/english/resources/ ... enship.asp): "The law thus makes it possible to have two
or more citizenships and allegiances at the same time for an indefinite period."
Many thanks again for the responses.