- Signal could just ban all UK IP addresses from accessing its messaging servers. Your encrypted messages still pass through servers controlled by Signal, Inc.

- UK government could require ISPs to deny access to Signal's messaging servers.

Of course, one could just use a VPN, set up a VM in a third country and run a Signal Proxy Server, etc.

It was hard enough getting family/friends to download/use Signal, as its UX is sub-par compared to alternatives.

If you start telling them they have to use a VPN, or run a server, etc, that will kill the network effect in UK.

I may not be up on how Signal operates now, as I stopped using Signal as my default instant messaging app when they dropped SMS. I maybe use it to send a message every other month now.

However, when I was using it they didn't sell anything. Not even ads. How do you participate in a market if you aren't a buyer or seller? If they are in a market the UK can't threaten them with dollars, and given they aren't based in the UK why do they care what ideas the UK passes?

It would have been nice the if she said what Signal would do if the UK passed the law, but as it stands I don't have a clue what she was on about.