You've almost explained yourself already.
1. Pole will make'em easy as pie. So assuming you want them, say this as you hand them A5 sized explanation leaflet of wfp:-
2. Mrs Georgian, Please forgive me, I'm dreadfully sorry for the delay in getting back to you, I know it's been about three months (minimise length of time) but new health and safety legislation coming out of europe means that I have had to invest in wfp - it's absolutely brilliant! - but I wanted to be fully trained before I called - I know I should have contacted you sooner but I thought I'd be around a bit sooner and time ran away with me.
Alright if I start at the front (point at top floor) or (jerk thumb at rear of property
) shall I do the back first? (alternative option, rather than a say no question)
How do I dream this stuff up? There are days when I'm good and there are days when I'm brilliant.... today I'm neither!