Everything is expensive. Every. Damn. Thing. The exchange rate, we always joke, is "dollars to pounds." Whatever it is in dollars in the States, it will be in pounds in the UK. Sometimes worse. Considering the current exchange rate is like $1.75/£1, and salaries are lower, that's no good at all.
One exception! Just to get this thread back on track: Tampax is both cheaper and better made in the UK. There! Feel better? I know I do!
Having lived in the UK and the US I have to say I think to a large extent this is a long lived fallacy, and the UK base is West London so it's not rural England Im comparing the US with. High quality goods are just as, if not more expensive in the US. Whilst petrol may be more expensive here I spend considerably less on it than I ever had to in the US. Utilities are cheaper, food (and decent food) is a lot cheaper. Household goods and pharmaceuticals/cosmetics etc are no more expensive. And after all the levels of taxation levied in the Commonwealth of VA and the feds have had their sticky fingers on the pay cheque even the taxes weren't that much cheaper. Maybe VA was particularly expensive, I couldnt see why it should be though.
Salaries in general are not economically lower they are numerically lower, and that is because you need more dollars to live the same quality of life. You also have to pay for everything in the US, my pills for eg were going to cost $35 a month, here they are free. High council tax here on expensive properties is about 2K anually, in the US you're looking at 5K dollars plus. US minimum wage $5.40, UK minimum wage £5.05 - when 800g of sandwich bread costs between 40 and 80p compared to $3-4 I know where I'd rather be living on the minimum wage!
Even my USC OH now admits its not all that much cheaper, even though he won't be swayed on the taxation issue and insists we go to FL and not pay states taxes at all
That said if you live a very petrol, alcohol and cigarette heavy lifestyle here you will get mullered on duties .. or you're earning hundreds of thousands of pounds .. in which case you hire an accountant and familiarise yourself with tax efficient off-shore accounts
More people are better off in the UK but less people are very rich. The wealth distribution figures in the US are quite astonishing, then I suppose that depends on your socio-political standing to start with .. but I digress. For most people within "normal" income brackets the COL when comparing similar areas UK/US isnt that much different.
Wales and Scotland and England are all very different ball games, particularly culturally, employment opportunities in wales and scotland are more than likely going to have you living in or near the regional capitals and major cities anyway so I wouldnt rule out the more provincial towns and cities of england if they provide you with better job prospects! Good luck!