" Terribly rude expressions (if pronounced grimly) are: ‘I am afraid that…’ ’unless...’ ‘nevertheless…’ ‘How queer...’ and ‘I am sorry, but…’
It is true that quite often you can hear remarks like: ‘You’d better see that you get out of here!‘ Or ‘Shut your big mouth!‘ Or ‘Dirty pig!‘ etc. These remarks are very un-English and are the results of foreign influence. (Dating back, however, to the era of the Danish invasion.) "

― George Mikes , How to Be a Brit