Tariffs would almost certainly get passed on to you as a buyer, yeah. The manufacturers aren't going to absorb those costs themselves when they're already operating on tight margins in a new market. So if the UK does match the EU's approach, you'd be looking at a noticeable jump in the sticker price of Chinese EVs pretty quickly - probably within weeks of any tariff actually coming into force.
The tricky part that doesn't get mentioned much is timing. If you're genuinely considering one of these cars, the window between now and when tariffs actually kick in could matter a lot. Some dealers might try to shift stock before new pricing kicks in, but others will just wait it out. Manufacturer announcements usually come before the actual tariff implementation, so watch for those - once it's official, prices tend to move fast and you lose any advantage.
Worth noting too that tariffs don't always come in one go. The EU rolled theirs out in stages, and the UK might do something similar rather than hitting everyone at once. That said, don't assume a delay means prices won't change. If you're serious about buying, keep an eye on government statements and dealer communications rather than waiting for perfect clarity - by the time everything's crystal clear, the cheap window's usually already closed.