They are running in the box you write in, and have never gone away for me, so I work around them.
Now they are ones that you need to click on to make them go away.
There's a 'skip ad' button, which counts down 5 seconds before it allows me to click, then when I click they don't go anyway.
If I try again I get "Snap! Something has gone wrong" message.
Legal ban on smartphones, schools in England
