If you managed to watch the series Downton Abbey this past week the Catholic / Protestant tensions were on full display surrounding the issue of the Baptism of the infant of Tom Branson and the late Lady Sybil Branson (née Crawley) .
There was an anti Catholic slur used that I was not unfamilar with that was introduced . That is
" left footer ". It appears I was not the only one that was unfamilar with that term and it's origins.
First Thoughts explains it at Why Are Catholics Called “Left-Footers”?