we should brush up on our u english

'Noblesse Oblige' captures most of the class differences (available on amazon) in British English. Although slightly dated, we should still brush up on proper terminology.

For example:
'knave' over 'jack' for playing cards
'scent' over 'perfume'
'loo' over 'toilet'
'rich' over 'wealthy'
'what' over 'pardon'
'good health' over 'cheers'