I had a chuckle at the 3.5Mbps that the wet string was getting in the article. When I first moved in to this house, I was getting around 3Mbps on ADSL. Thankfully now I'm on 100Mbps fibre (not amazing by global standards, but good by Australian standards).
That wet string would have been an upgrade for me.
Not representative of all of London, but at least around my parts it is slow ADSL or nothing :(