So as I understand it, we have 2 routes to cold and 1 route to mild.
Cold route one, the limpet low sinks south and Iberia doesn't throw a crazy physics-defying low our way.
Cold route two, the limpet low has some wheatabix and sticks around, drawing cold air in on the north flank and eventually let's the easterly flow in.
Mild route, the limpet low is a good boy and sinks southward, but Iberia conjures up a bonkers low and the party's over.
Or, a seagull does a poo in the Atlantic and it's game over.
How am I doing?