A Double taxation agreement means one or both country agrees to forgo some or all the tax they would otherwise demand. That's why the US technically taxes it's

A Double taxation agreement means one or both country agrees to forgo some or all the tax they would otherwise demand. That's why the US technically taxes it's citizens working abroad, but in reality collects much less than the official rate. So if we do that for companies, then you are definitely not going to get 75% in the UK and 30% locally...