However a sleeping bag can be handy; if you're out there in the summer it doesn't get below 30C at night, with stupidly high humidity, and if the air-con in your block fails for whatever reason (eg power cut to the quarter of the accommodation site containing the Brit blocks) the only way of getting to sleep is to grab the sleeping bag and find a floor where it's still working.
Point to note; while it's all US provided, all UK working buildings have UK plugs and all UK blocks have adapters for UK plugs, so no need to bring your own; knowing that would have saved me some baggage space.