Well I'm going to answer everything here but as long as I think this explanation is completely off the topic I'll hide it under a spoiler tag.
Cool thanks for the explanation.
Yes I understand the concerns of connecting to an unsecured wifi network found out in the public domain.
Very risky I will agree!!
This particular network I'm talking about (the only one this 'glitch' works with is a well known, managed wifi network setup by Sky and is available all over London and other high population areas.
I think there is very little risk with connecting to this, free to use, public network.
There are other, free to use networks around London but I don't trust them either!
https://www.thecloud.net