Yeah, people search the web via search engines and go to the product page directly. It really doesn't matter if the spelling is wrong or misspelled. Instead, if the misspelled keyword has high traffic, why not misspell your keyword and drive that traffic to your site?
Ultimately it boils down to individual case and situation. And as someone rightly said here, the traffic or customers are just passing on to other sites from one site. That doesn't mean UK is losing millions, it rather means, someone else is making more money in UK than the first one.