AND-3134 - Also relates to native code change AND-3149. Added an id #banner_container to all templates that show a banner - the existing id I was using on the banner placeholder div (indicated by the dark grey box) #advert-banner-content was giving incorrect getBoundingClientRect top and scrollTop positions due to being a nested div I believe, so to get the correct position I used the parent wrapper div and gave this the unique ID #banner_container.