Thanks for the link Ian. As you say, seems to be a separate page for the UK, rather than the global list on the web-site!
I was able to do the update by clicking mouse on "Edit this page" tab and pasting the line of code (obtained from Edit Instructions at the foot of the global list) into appropriate place alphabetically into the list, then updating each field within this line, using the other entries as an example.
Thx,
Chris