I always say my neighbour is a computer expert and can sort it thank you.
When it is people wantingto do windowss,patios,etc, I point out I am in a second floor flat (or however many floors I fancy to add!) and that it is leasehold so they have to speak to the landlord.This is AFTER they have spieled on and on and I am "so sorry that they have had a wasted call" (Not!!) They have usually given up before this point.