Thanks again for your help, I'll have to live with 39.9mbps. It's annoying, as BT have offered me the Option 2 package for an astounding £15 a month - such a pitty 😞
Nothing stopping you taking the Infinity 2 package if it is cheaper and you want it. It just means that you will not get any faster speeds than you are already getting. You will need to remember at the end of the twelve month contract the cheap deal will cease and you will go onto the full price for Infinity 2, at which point you should down grade to Infinity 1.