If you look at the proposal, it clearly says this would only apply to (de facto) broadcasters, not to ordinary people; look at the sentence mentioning OFCOM.
One of the central planks of this bill is to make OFCOM the regulator of all websites (and messaging services) that serve content to British citizens, including demanding that any site with user generated content verifies the age of viewers and scans everything and anything for CSAM (and apparently truthiness, for Tory values of "truth")
As for age - it's already there, you can't serve underage content to minors. As for "truthiness" - I'd say this part makes a lot of sense, given the current pandemic of fake news.
