Thanks Michael; thanks @candlerb - really helpful. The BTwholesale checker does indeed say WBC FTTP available, Install Process: 1-Stage and states:

Single Dwelling Unit Residential OH Feed with no anticipated issues.
FTTP is available and a new ONT may be ordered.
As a fibre priority exchange, FTTP has priority over other products if available at the address
As a WLR withdrawal exchange, product restrictions apply

From this I read an overhead install (OH). What a wonderful forum this is

that is good news. All you now have to do is order, think of where you'd like the csp (outside fibre box) to be and where in the lounge you'd like the ont to be (fibre to ethernet)