I am now seeing DLM increase the speed since the cutover to FTTC / VDSL on 21st April.
The modem router has not been restarted since the 21st, and have seen a number of speed increases:
9999 38791 28-Apr-2017 04:39
9996 34781 27-Apr-2017 08:11
9996 33170 26-Apr-2017 14:01
9996 33065 24-Apr-2017 07:42
Zen Fibre 1 service is quoted as 38Mbps down and 9.5Mbps up, so looks like I am now close to these limits?
Connection - Zen Fibre 1 Broadband VDSL/2 at 34M/10Mbps on BT Openreach