I just had a look at Hyperoptic for your area.
https://www.hyperoptic.com/register-interest/?pafid=...
2 We're rolling out in your area
We're bringing our full fibre network to your area!
Before we can connect you, we'll need permission from the Freeholder or Property Manager - so be sure to let them know you're interested.
So based on this result, it is showing that Hyperoptic are interested to install in your building but are needing wayleave agreement.
I have the same issue for my building in Central London. My management team granted wayleave for Community Fibre and it's live here as of 6 months but they were completely stubborn to grant wayleave for Hyperoptic and that's despite me being a registered Hyperoptic Champion of my building. I got 30+ registered interests but my technical services manager refused to grant wayleave for Hyperoptic.
Anyway, we have Community Fibre here but they'll only install in London.
So it is possible that a wayleave can be granted for one provider but be refused for another.
If you've got monthly leaseholder's meetings, you could try attending the meetings and get hold of your housing estate managers and discuss with them. You can also email them regularly and get your neighbours to put pressure. That's the only way you can make your property manager fed-up and eventually sign a wayleave.
Once a wayleave is granted it usually takes 6 months to 2 years for the service to go live. In my case it has taken 20 months for Community Fibre to go live after wayleave was agreed. Though, I've not signed up yet.