I just don't get what is happening here as I see you have a 'WAN Status' tab in your Broadband settings that I don't have and yet other settings are missing. Can you please check and confirm which firmware version you are running - mine is 1.00(AAKL.28)C0, which I believe is the newest available.
Once in as Supervisor you should also find that the TR069/TR064 settings are available so you can disable them if you want to.
As a point of note my router was also originally a John Lewis Broadband one so I'm surprised at the differences.