Labour, albeit with a wish for a change in leadership. Wouldn't want to back a centre-right party like the SNP.
I thought the SNP was center-left?
Their ideology is Scottish independence so they go with the winds. Sturgeon is a member of the party's left when Scottish independence was all about STANDING AGAINST TORY AUSTERITY; Salmon was a member of the right when becoming an Ireland-with-oil-esque tax haven was in vogue. As the political winds turn, they will pick up another leader with a fish-themed name who will subscribe to whatever ideology is popular at that current minute. Maybe First Minister Pilchard will strike a case for a business friendly alternative to Comrade Corbyn's People's Republic of the British Isles, or something.