Surely those teachers who teach history and humanities should be required to have such knowledge !!!
One of the problems in the UK, is that the Curriculum becomes very narrow very quickly. On the Continent (and to some extent in Scotland) - every single student who continues post 14/16 edu HAS TO continue to study all subjects, including history and geography, that will include citizenship/politics (as well as all sciences, maths and 2 foreign languages). The UK 6th Form system is ridiculously and dangerously narrow, with only 2 years in 6th Form instead of 3 on Continent- and only 4 subjects in Year 12 and 3 in Year 13- and currently not even General Studies on top. (I used to be a 6th Form specialist). Moreover, students tend to choose all 4 then 3 subjects in same study area, all sciences, or all design/IT, or history/geog/English - and increasingly all 'soft subjects' like Sociology, Business Ed + 1- instead of classical hist/geog/mod langs... Far too narrow at far too an early age.