To add to the annoyance from the fact that this banner
- shifts content because it's pulled in by JavaScript instead of being inserted by back-end;
- reappear very soon after you closed it the previous time,
it also has a *tiny* close button which leads to misclicks (the rest of the banner is a click area leading to the target page):
I suggest making it 22px rather than 17px.
Related task: T204690: Close button on CentralNotice banner is too small on mobile
