What actually wins this fight is on the other side. A two-connector polarized NEMA 1-15 plug is a tiny, convenient, easy to use form factor that will still deliver 1400W. The experience of a normal consumer plugging in their normal junk in the US is just plain superior to the poor folks across the oceans charging their devices with BS1363 connectors that are almost bigger than the phones. And don't even get me started on Europlug.
Spend $5 or more an outlet and the plugs will work quite well.
(These kinds of things are what you should focus on if you build - materials are relatively small compared to labor and doubling your material cost on things like outlets can make a much nicer house. And if you want a UK outlet, you could get one wired up.)
Plus, I will fight anyone who suggests that 1400W is enough for a decent kettle ;-)
[0] Admittedly this was mostly included to offset the idiosyncrasies of final ring circuit wiring, but it's still better than just a big breaker.