At the top of the page you can see your avatar, directly under that is your name.
Hover your mouse over your name and a drop down menu appears. At the top on the left hand side is 'personal details'.
Click on this :)
I'm on 100 Mbps in Edinburgh, have been for the last 8 years or so.
A friend up North in Balquhidder has just laid (as in finished a few weeks ago) a private community cable for the area and they are getting 1 Gbps :)