They are doing a promo for all the varieties at Woolies at the moment. I bought a couple today on BOGOF (cheapest free). 100g-ish bars for 85p or less (depending on variety).
They are doing extra cream, standard bar, fruit and nut (hazelnuts, though) and the white and milk choccie one.
I bought that one for my female colleagues at work.
They weren't too chuffed when they saw its name, "Happy Cows".