Someone literally made the same complaint on Reddit yesterday morning.
Within two minutes I'd popped to Amazon where Disc versions of the console were available - I had it in my basket and at checkout as a test - Reddit poster confirmed they to had secured one.
Someone else popped into the same thread, Amazon were now sold out - five minutes later I was at Argos with consoles in stock - OK, some headset was also included, but everything was in stock and at RRP - those headphones could have been sold as "never opened". That bundle is still on their website now as in stock.
Finally I popped along to Very - where I was also able to take a console all the way through to checkout.
Stock is definitely there in the UK - but people need to put in some effort.