just found out what it says on the side of pound coins:

DECUS ET TUTAMEN, meaning 'An Ornament and a Safeguard'
Used on British, English and Northern Ireland designs.

NEMO ME IMPUNE LACESSIT, meaning 'No-one provokes me with impunity'
Used on Scottish designs.

PLEIDOL WYF I'M GWLAD, meaning 'True am I to my country',
Used on Welsh designs.

very telling