All we know is that UK nationals aren’t willing to do those jobs at the wages being offered. If employers raise wages to something liveable and decent then it’s reasonable to assume employment in those areas will increase.
I'm not from nor living in the UK but I sure hope things work out.
My post was a dig at the idea that all the UK needs to allow into the country is highly skilled people. I don't buy that argument.. But lets see.
If the cost of goods increases, it won’t likely be severe since it serves the entire population while only a small percentage of the population produce the goods. Also changing prices affects demand independently from cost of production.