I'm sorry, but until we can find a way to close down the countless other tax loopholes exploited by multinationals, I'd be completely happy with a 10% DST on any advertising targeting UK citizens. Low-hanging fruit.
I think those talks have ultimately stalled, so the right solution is getting back on track to a global tax system.
(Interestingly the deal struck in 2021 exchanged the promise of no US tariffs with the transition away from DST. It's no surprise this is a hot topic again with Trump's tariff regime.)