Complex sentence: The British Army's 1 Artillery Brigade and Headquarters South West is a formation under Force Troops Command that has control over close support artillery units within the British Army and the Regional Point of Command (RPoC) for British Army units in the South West Region.
Split into simpler sentences: The British Army's 1st Artillery Brigade is a formation under Force Troops Command that has control over close support artillery units within the British Army. Its formal name is "HQ 1 Artillery Brigade and HQ South West" and thus acts a a Regional Point of Command (RPoC) for British Army units in the South West Region.