Spring break is a week -- most of the area universities have theirs mid-March but CUNY keyed theirs to Easter/Passover this year so theirs was in April. As for summer break, I'm a free woman as of mid-May, 'til Labor Day (which I think is the same as fall Bank Holiday for you). We also usually have three weeks for winter break, fwiw -- late December to mid-January. (Before Christmas, and classes generally start the day after the MLK holiday, which isn't his real birthday as it shifts and is on a Monday every year.)