I would take at least one minimum, advise you to take two "facilitating subjects", I think history along with government and politics would be a deadly combination! it sounds very interesting either way but not too difficult probably, hence why it is not on the facilitating subjects list.
Facilit8ing subjects:
Physics, CHem, Bio, Maths, History, English, French, Latin, German (other classical and modern languages), Further maths.
"Good" subjects but not deemed challenging enough by unis to be in that list:
Economics, law, Philosophy, Religious studies.
Lowest of the low(absolute scum):
Business studies, accounting, Home economics, maths studies. etc
It depends on what course you want. Im not sure where government and politics fall under this list.
Google facilitating subjects.
I hope I didn't offend anyone, the op needs to make informed choices and they need the truth, even if harsh.