Upstairs

If by chance you meet a Lower Servant, you should walk past, leaving them un-noticed... you will spare them the shame of explaining their presence

more... Downstairs

Lower Servants: if you meet one of your betters in the house, endeavour to make yourself invisible  'give room', turn your back, and avert your eyes

more...

"I really don't have problem with having servants...if I'm not being served, they don't have a job. This is absolutely magnificent. I'm enjoying it."

Sir John Olliff-Cooper