I have found that the best way to contact a peer, is through "They Work For You"
Go into Google Search UK pages, type in the name of the Peer you are after, then scroll down until you see that peers name against "They Work For You"
Put your message in the box, they have got to answer. It may be not the answer you want but at least it will be an answer.
Which is more than I'm getting from some of my emails, I'm beginning to think that my IP Address is listed as spam on some Government computers.