The existing ADSLx speed is completely irrelevant as it depends on distance from the exchange. FTTC speeds depend entirely on the copper distance between the FTTC cabinet and the premises.
Estimates for most lines on the Openreach commercial rollout are available from this checker
, using either the phone number or address. The postcode checker option is not to be trusted.
That checker should give you the cabinet number the line is connected to, even if there is no FTTC estimate. Given the cabinet number you need to find it if there is no estimate.
My broadband basic info/help site - www.robertos.me.uk
| Domains,site and mail hosting - Tsohost
Connection - Plusnet
UnLim Fibre (FTTC). Sync ~ 58.7/14.6Mbps @ 600m. - BQM
"Where talent is a dwarf, self-esteem is a giant."
- Jean-Antoine Petit-Senn.
Allergy information: This post was manufactured in an environment where nuts are present. It may include traces of understatement, litotes and humour.