Just to slightly clarify some potentially ambiguous wording - the regions used to have presentation galleries but these became redundant for that initial purpose but were used for short news opts, often self operated by the presenter.
Many regions (if not all?) do still have a second gallery designed for simpler output with much lower staffing levels, which is used for the short bulletins at Breakfast, and is often referred to as "Pres" for historical reasons, but in some places as the "Bulletin Control Room" (or is that just the nations where they can't call it pres for obvious reasons?)
It can still be used to do pres-like functions, playing out pre-recorded regional programmes etc, but it is really a mini news gallery.
That said, these galleries are pretty comprehensively equipped, they can run a whole 6.30 programme if required. Leeds has done this when their main gallery had an equipment failure, and I believe Plymouth used Bristol's pres studio and DTL studio to get on air when their refurb project went pear shaped and left them without power fairly recently.
Write that down in your copybook now.