Party packs

Is it possible to form a stable coalition with more than one political party? The Conservative/Lib Dem coalition of 2010– 2015 was in fact unique in being the only British coalition featuring just two parties.
— Lord Aberdeen’s coalition on 1852–55 was made up of 11 Whigs, six Peelites and one Radical, Sir William Molesworth, who served as First Commissioner of Works and was later described by Gladstone as ‘perfectly harmless’.