I just moved to the UK from the USA, where we had access to all sorts of onions (being in Texas): yellow onions, green onions, shallots, red onions, white onions, sweet onions, etc.
We bought a bag of onions from a store here and they were simply labeled "British Onions."
They are bigger than shallots, but definitely smaller than the onions we used to get from Mexico. They look yellow on the outside and are greenish/white on the inside, but they are not sweet - they are rather bitter ;)
Is this just a brand of a sweet onion that is grown in the UK?
Further, are these equivalent to an "English Onion," which I've seen online when searching this query?