Indeed.
The 18/2 product was in a trial by Openreach, and was available only on a few cabinets, and only to people who could only get limited speeds (below 2 or 3 Mbps IIRC). BT Wholesale didn't take part in the trial, so it was presumably meant for one of the LLU ISPs.
I don't know if it is now available more freely.
The 18/2 trial is separate from the LR-VDSL trial. The STIN for LR-VDSL specifies a single 40/10 profile.
Edited by deleted (Sun 11-Dec-16 18:00:54)