Bristol-Knock
Not really a surprise that Ryanair has pulled this route for the winter. The loads have never been high. Even in July and August the monthly load factors rarely get beyond the low 70s%.
Knock was one of the original routes when Ryanair opened its Bristol base in 2007 and from memory has operated continuously since then (originally 4 x weekly reduced to 3 x weekly in recent years) except for the winter of 2011-2012 when it was given a rest.
Aer Lingus Regional axed Bristol-Shannon towards the end of summer 2012 (end of September I seem to recall) and hasn't reinstated it since then. Passenger numbers seemed reasonable but the airline presumably believed there were better opportunities elsewhere.