Are you sure it was an Openreach representative and not an Alternative Network, I’ve not heard of Openreach canvassing an area door to door ,there is no point as they don’t sell services to the public , but Alt Nets may do this type of canvassing to gauge the likely take up , they may even take advance ‘pre orders’ , so they can get customers signed up as soon as their network is ready , but in any event, as previously stated , this has nothing to do with BT , even if it were an Openreach person knocking on doors .
being a bit nosy I looked at the general area on street view , this shows property that is of a design built in the 1960’s-1970’s , so the area is almost certainly DIG armoured cables , no duct , these types of areas are by far the most expensive type of area for Openreach to retro build a FTTP network into , and the chances are they won’t treat an area like this as a priority as the cost per tenancy is likely to be way in excess of the allocated budget, for the amount it would cost to serve 50 properties here , they could probably serve 400 -500 properties in areas served by poles or already ducted areas (housing built 1990’s and onwards) .
If it were a Openreach surveyor ( but they don’t normally knock on doors ) they survey the area and produce a design, irrespective of the cost, they don’t decide which designs are completed , that’s in the main a budgetary decision made by management
