Ahem, cough.... section 125 of the Communications Act 2003.
But as I'm not currently in the UK this act doesn't apply to me and to what I may or may not do.
Even if it did, it wouldn't be a problem as I am using the wifi connection at the top of the available networks, and this is the one in the house I'm in.
I was just using the list to show that unencrypted networks are easily available in many places.