After much perseverance, I finally find what I’m looking for.
I enter the information into the Netgear router and tell it to try all connection settings for DSL in auto format one by one. It comes up saying this may take 4 minutes and off it goes seeking the net. Wonga the green light starts flashing and we now have internet connected and wifi in 300mbps in N and G. And with that I pull the plug on the Post Office router I was being forced to use. And to the cupboard to sit next to the BT Home Hub 4.