I've had a look at some comparisons and you simply can't choose anything decent for under £30 a month.
2 examples you see here with OFNL. https://www.mthnetworks.com/internet-ofnl/
MTH Networks OFNL package
900 Mbps
900/900
Download - 900Mbps
Upload - 900Mbps
Unlimited Bandwidth
Full UK Based Support
Prices Locked In Contract
£57 | month
That's not out of the ballpark. For a good quality Openreach-based provider, I'd expect to pay ~£55 per month for 1000/120. Anyone who claims a headline price significantly lower than that is likely hiding the true price via in-contract price rises. (For example, EE starts at £45, which becomes £48 then £51 by the end of the contract)
Altnets doing deals at £30 are all very well if you have them available, but not everyone does. Of course, if you can, you should take advantage - while they are burning their venture capital!
Well actually after doing some searching I found out that Vodafone are offering 1000/120 for £36 a month with £85 voucher, which is basically the equivalent of £32.46!
Vodafone
Online exclusive Full Fibre 910
New customers only Offer Ends 06/01/2025 Price locked until April 2025
£85 voucher
920Mb-1000Mb expected speed
No setup costs
24 month contract
£36.00
per month
(Prices may change during contract)
£32.46
Avg. monthly cost
Onestream
Hyperstream Full Fibre 1000
New customers only Router price not included. Router rental from £4.95 per month
920Mb-1000Mb expected speed
No setup costs
24 month contract
£28.00
per month
(Prices may change during contract)
£28.00
Avg. monthly cost
And here I also found Onestream doing 1Gbps for £28 a month! Even I am surprised to see this and that's also under Openreach. Ok, this does not include router. I'm ok with that, at least I can buy a high end router.
Their 200Mbps is £20 and 150Mbps is £18 a month. Similarly Vodafone are offering 200Mbps £21.88 Avg. monthly cost with the £75 voucher.
These offers I'll certainly accept as best alternatives if Openreach FTTP became available. Now maybe they are not good quality or trustworthy Openreach providers but if it is FTTP it can't be a big mistake.
But the same cannot be said if I had OFNL. Even if we ignored the gigabit packages and only concentrated on basic 80/20Mbps these cost £31.80. With 40/10 starting at £28.20 with MTH Networks and Merula it is £30 for 40/10 and £32.99 for 80/20. It's not like I'm intentionally picking them as the most expensive. There's simply no cheap ISP on OFNL that can give you £20-25 a month deal even for basic 40-100Mbps packages.
OFNL are probably the most expensive wholesale network provider in the UK. I'd be very much interested to know if there are some more expensive providers compared to them. It is no surprise that the OP wants to know when Openreach will become available.
Even if we were to concentrate only on Wholesale Altnets you will find that you get reasonable prices that won't break your bank anywhere under Openreach, CityFibre, Freedom Fibre and Netomnia. All offering packages for around £20 a month. The contract price hikes will indeed increase but at least there's some hope of finding a new deal at the end of the contract. Also, if it jumps only by a few quid then that's also fine by me.
But what is not fine is having to pay £35 per month for 100Mbps, which is what OFNL are doing with all their ISPs! That's unacceptable considering that they don't even appear anywhere in Uswitch, MoneySuperMarket, Go.Compare, etc so you won't even get vouchers included. They are supposed to be Ofcom regulated but their prices are anything but.