I'd also like to know what the latest is on the IPv6 rollout please Hyperoptic.

The full roll-out of IPv6 is currently taking place. New buildings are being updated every day and our team is on track. Feel free to contact us if you have any additional questions.

How do I know when IPv6 is installed? Do I need a new router, or anything changed in the current hyperoptic-provided one?

Tools like https://www.thinkbroadband.com/tools/what-is-my-ip will report your IPv6 address, assuming your device (PC/phone/tablet) is set up for dual stack, i.e. run IPv4 and IPv6 at the same time and most are out of the box unless you turned off IPv6

Thanks.
I added a new ipv6 connection to the Hyperoptic router and returned an IPv6 address.
in Windows, I get

netsh interface ipv6 show addresses

Addr Type DAD State Valid Life Pref. Life Address
--------- ----------- ---------- ---------- ------------------------
Temporary Preferred 2h 1h fde2:50e4:551f:0:6df6:c880:cdc4:1ce2
Public Preferred 2h 1h fde2:50e4:551f:0:89aa:d2b5:e7d2:8fbf
Other Preferred infinite infinite fe80::89aa:d2b5:e7d2:8fbf%17


so apparently IPv6 is enabled?
but still if I go to https://www.thinkbroadband.com/tools/what-is-my-ip it says I only have IPv4

That is just a local LAN IPv6 address until the Internet interface of the Hyperoptic router is given the IPv6 address it will not be able to pass on a public IP to the machines on the LAN.

We can see some people with IPv6 via Hyperoptic on the speed test but its a small proportion yet

ah, the Hyperoptic router says this

Does not match the IPv6 block I know about for Hyperoptic, so time to talk to their support

Hi, we'll be making the updates on our side, if you'd like to know more details, we'll gladly check for you. Please contact our CS team, available 24/7, they'll look into your account and assist you with this.

Had a similar issue!
A 1* on Trustpilot seems to get their attention if you want some decent service - shame it come to tht!