I don't think this is the case here. The English and Scottish curricula (and, I imagine, those of Wales and NI) are different. Most aspects of British colonialism are (were?) simply not taught in England unless you specifically chose that subject late in high school.

Looking back, it's also kind of amazing to think that the Northern Ireland Conflict was largely glossed over in English schools while it was going on, but the news coverage was pretty one-sided also.