What are the guards called whow guard buckingham palace?

this may confuse you... but just that, the guards.... britain has several regiments designated as guards, for example the coldstream guards, etc. this goes back to pre-napoleonic times when guards regiment were seen as superior to regular ones (indeed soldiers in guards regiments had two ranks, one (the higher) for dealing with other regiments in order to back up their superiority, and the lower rank for use inside the regiment in order to allow it to function properly. by being seen as superior these regiments were considered appropriate to guard the queen.