Comment by alphazard

I'm talking specifically about US companies, which make up the lion's share of popular websites. They are served from the US as a primary location, and the company is incorporated there as well. Modulo CDN hosted assets, there is no presence in the UK.

If the company is in the UK, then yes, they are obviously screwed. The damage to the UK's web presence has already been done. I don't expect anyone would want to incorporate an internet dependent company there.