Country Life spreadable gunk for sandwiches. Can't get butter to spread thinly enough, especially in this weather. M&S spreadable butter (which is butter, not margarine) for toast, crumpets etc. Organic butter for cooking.

Butter, always.
The other stuff doesn't taste right.

Lurpack Light!!! Nothing else comes close really (apart from Lurpack but I am on a health kick )

i use the M&S Touch Of Butter spread but you can't beat real butter on warm crusty bread.

I use Lurpak Lighter Spreadable too. It's good stuff.

French butter, either doux (unsalted) or demi-sel (salted), but peferably extra-fin, is the best in my experience. It has a different texture than butter in English-speaking countries and is just superior. It's available in a few stores in the US and here in Slovenia, so I assume you can also buy in the UK.

I don't think you can beat Irish butter. The quality of dairy in Ireland and the UK (on account of the excellent grazing) is very high.

Butter always, and unsalted butter for cooking