Redshark News have just received one of the first production cameras in the UK https://www.redsharknews.com/production/item/5824-bmpcc-4k-we-have-our-hands-on-one-of-the-first-into-the-uk
They're only going to start shipping from the warehouses this week...to the stores. The camera stores will no doubt then start shipping out to customers next week, not this week.
for dual recording, the Zoom F4 becomes 2 channels. Shouldn't be an issue for most, but when I need at least 3 channels (two lavs and a boom for example, or simply 3 lav mics) then I wouldn't be able to use the dual recording feature for all channels.