Hello and welcome! I studied for my MA in History here, and met my husband. I don't know if History teachers are on the shortage list here (but I think someone already said they are not) but I do know that when studying for a PGCE here, history gets one of the lowest stipends which makes me think there is no shortage of them.
Maybe you can study for something like an MA, or a PhD here if you want to teach at the Higher Education level. MA's last a year so shorter than the History ones in the US at leat that I looked at a few years ago, plus you will get a good idea of what it is like to live in the UK!
Either way, good luck with it all!!
