Just throwing in my 2 cents, the sets shelfwarm pretty hard in my country too (the toy store I go to in one of the biggest shopping malls in the city I live in still has Jyn Ersos on the shelves, and lots of kids roll through that place (I visit it quite often), not to mention how terribly these sets were selling in my hometown, but, granted, it was a much smaller place), so I don't think it's a UK-specific occurance.
I was actually thorn whether or not I should reply to this post, seeing your other posts on the SW sub-forum, how you were so stubborn that nothing I'd write would really change your mind, and how you edited the post I was replying to in order for it to better support your latter reply (for the record, you actually did say you were certain that these two sets are not cancelled, just because I worded it differently and didn't quote you 1:1 doesn't make my reply less legitimate and I was not, in fact, "desperate to find stuff that will support my point here"; I also find it funny how you deleted that bit in the latter edit. The only thing I have to admit I was wrong about is the bit about less sets being released in each wave - I was pretty sure that Lego was still releasing these figures in the standard 2-wave formula, not this weird 3-wave one, and the only brickset list I managed to find didn't list all of the CCBS Star Wars sets so, my bad here).
But, I'm glad Sir von Lego actually cleared things up and proved that you were wrong all along, despite you acting so confident about stuff you had no possible way of being 100% sure about.