Would you want to teach History?
History is a very oversubscribed subject at PGCE level, and the best courses are heavily competative. The jobs don't come up as frequently either. Unless you are in a high turnover area, such as London, it tends to be "dead mens boots" or, like me, mums not going back after maternity.
Also be aware that of all the subjects now under the Gove microscope, History is the one at the forefront of his beady eye. It is VERY likely that the subject will change drastically, and not for the better, in the next few years. Think less fun, and more rote-learning "Plato to Nato". The pressue will also be firmly on the departments to boost marks in the newly Baac'd subject, and it won't be pretty.
I went into teaching after other careers, but it failed to balance with having two kids within 15 months of each other, and the increasing push to teach to exam and not to teach actual, real learning was immense. Behaviour was also a very real issue and you have to be totally certain you can handle it.
I did my PGCE and NQT before kids, and I was working all hours. The NQT year was worse, in terms of work hours, than the PGCE.
I'm in the process of returning to work now, but I am swapping to Primary, i'm not sturdy enough of heart for the exam hell of Secondary anymore. And i'm lucky enough to be able to work part-time. Full-time teaching is a big job when you've got kids, though I know plenty who do it. Thing is, they mostly got to that "I'm just tweaking my Scheme Of Work" level before having kids, they weren't having to plan from scratch with kids demanding tea.
It sounds very negative, but if you want it, you'll do it. I would go for the Institute of Education History PGCE if you can, it's widely regarded as the best.