Has anyone seen Chinese Geese in West Cumbria?

I'm relatively new to Birding,but saw a goose in a reserve in Workington that did not meet the profile criteria of any goose in the RSPB handbook. I have had a look onlne and the birds I saw strongly resembled Chinese Geese. Are these common in the UK, like an invasive species? Or is this  a bird that is a rare spot?