You can't avoid tickets from speed cameras just by not speeding. You can't even avoid them just by not driving! https://www.youtube.com/watch?v=KY38N4vnhzI

And besides, as other commenters pointed out, even if things get lost in the mail or the government otherwise drops the ball, they'll still consider that your fault.

Tesla isn't speeding either (probably; if FSD is speeding that's another issue), they're just manufacturing cars and leasing them to people in the UK.

In most US states, auto registration and auto titles are two separate things, which means our automated traffic camera systems can mail the tickets to the people who are probably actually driving the car. But I guess it's easy for a country like Britain to lay that kind of burden on auto manufacturers when they don't have any of them anymore.

Not manufacturer, leasing agent. Other manufacturers tend to contract out leasing. This probably happens to them occasionally as well, which makes me wonder how newsworthy this really is.