This is unrelated, but I can say that on my street takeup as at least 50%. I can tell because I see the black fibre cables with the signature service loop that looks the same on every property. The only other thing coming from the utility poles is Openreach VDSL2 and those are thicker and look different.Even at the current pricing, assuming their installation methods are uniform (so it's easy to tell) I would estimate a 10% take up after a year or so of availability.
Our options on our street are Openreach (VDSL2 only), VM (HFC only), CF, and very recently Hyperoptic, but they are so much more expensive than CF for the same product that I don't see anyone choosing them unless they didn't know about CF.
So basically, on our street almost everyone had Virgin because even their cheapest plan is much better than VDSL2. But since CF came, they've switched en masse to it because you can get 940/940 full fibre for the same price as VM's 135/20 HFC, plus everyone hates VM, so it's a no brainer...
And CF has made sure everyone around here knows about them because they send promo materials aggressively. I actually had to contact them and ask them to stop because I was getting letters every 2-3 weeks for years.