As recommended by our resident brainiac, the West Indies porter has bags of flavour and is my favourite.
Well done Guinness, those bottles look beautiful. I'll be looking for these. I've tried their "Export Stout" (has a yellow label, carbonated like the old Guinness bottles, but with a chocolate flavor)...so-so...
I've definitely seen these in Asda. Not tried them as I'm not a fan of porters but the bottles attracted my attention.