I have rated your answer, and it would seem that you will only accept a positive answer.
My online search for advice, threw up a web site with the headline " Ask TalkTalk Tech Support-Tech support will answer you now" web address was Just answer.co.uk/talktalk.
I initially believed I was talking to a talktalk website, therefor sent my problem, It was only after I received a reply that I realized that I was not talking to talktalk, and in fact that the website was American, and I had been misled by the website headline, as why would I ask an American website to solve an English electrical problem.
I am sure you probably have some knowledge of our domestic electrical wiring systems, and know that we use a 3 wire cable, with a power line, a neutral line and an earth line, and as I have no idea how a power line adaptor uses these 3 wires I believe that you probably do.
I did not want to use a wireless system that is why I prompted for the power line adaptors. If your advice is that I cannot use PWA,then I will have to concede that you have answered my Question, and therefor have no option but to rate your answer as GOOD?.
It was my mistake to contact you in the first place, and will accept the cost of so doing.
I will not send any feedback. and thank you for your efforts.