I'd be most grateful if you could enable the Header Extension on hlptest.miraheze.org
https://www.mediawiki.org/wiki/Extension:Header
What I'm hoping to achieve is to replicate the banner at the top of https://www.healthylondon.org/ on the wiki, i.e. replicate this bit at the top of every page
https://www.dropbox.com/s/y21ky5gxe41n6rc/Screenshot%202017-04-26%2011.44.52.png?dl=1
Many thanks in advance
Best, Sam