Thanks for your reply, along with others. To answer your questions, the chart shows 3 collums/bars. The best performing colour is a 1mtr long CAT6 Ethernet. I also got the same performance with a CAT5e I tested to ensure it wasn't a very unlikely issue with my cable.
The other two columns in the graph is via WiFi, in two specific locations in my home. One is stood right over the Superhub and one in another room. (I am very sure I have explained this in my original post?)
I am not using software to log my broadband, I am using a laptop, with Speed test.net connecting to a Responding server less than 7miles from my house.
I will download the very much appreciated links to logging software and let you know results in a couple of days.