Just a little log kindly sent to me proving the point that this isn't some obscure EE trial with Openreach but the exact same MSE and IP ranges used by BT Consumer via BT Wholesale:
Sat Jul 6 20:38:09 2024 daemon.warn pppd[5644]: No CHAP secret found for authenticating us to acc-aln2.sc
Sat Jul 6 20:38:09 2024 daemon.info pppd[5644]: CHAP authentication succeeded: CHAP authentication success
Sat Jul 6 20:38:09 2024 daemon.notice pppd[5644]: CHAP authentication succeeded
Sat Jul 6 20:38:09 2024 daemon.notice pppd[5644]: peer from calling number 14:7B:AC:B3:23:5C authorized
<Snip>
Sat Jul 6 20:38:09 2024 daemon.notice netifd: Network device 'pppoe-wan' link is up
Sat Jul 6 20:38:09 2024 daemon.notice hostapd: wlan1: interface state HT_SCAN->ENABLED
Sat Jul 6 20:38:09 2024 daemon.notice hostapd: wlan1: AP-ENABLED
Sat Jul 6 20:38:09 2024 daemon.notice pppd[5644]: local IP address 86.150.[redacted]
Name: acc-aln2.sc.
21cn-infra.bt.netAddress: 213.1.163.176
BT Wholesale MSE 2 in Scarborough - this takes the cablelink from Huawei OLT BAADMT and likely newer ones too. Upgrade of original MSE chassis for capacity.
MAC proves out it's a Nokia 7750 MSE:
Company Nokia
OUI 14-7B-AC
MAC range 14-7B-AC-00-00-00 - 14-7B-AC-FF-FF-FF
IP address issued is:
Name: host86-150-x-y.range86-150.btcentralplus.com
Address: 86.150.x.y
inetnum: 86.148.0.0 - 86.159.255.255
remarks: *******************************************************************
remarks: * Report abuse via:
http://bt.custhelp.com/app/contact/c/346,3024 *
remarks: *******************************************************************
netname:
BT-CENTRAL-PLUSdescr: IP pools
<snip>
role: BT CENTRAL PLUS - OPERATIONAL SUPPORT
remarks: *******************************************************************
remarks: * Report abuse via:
http://bt.custhelp.com/app/contact/c/346,3024 *
remarks: *******************************************************************
address:
BTaddress:
WholesaleNot a big deal in the grand scheme, the product isn't exactly astonishing and few folks would be interested I imagine, but certainly they're testing the limits a bit.