Woolworths are offering 20% off confectionery until 27th November, and on top of this it's 3 for 2, meaning you can get ANY 3 tins for £11.18! (works out at £3.73 a tin!) These are the 1kg tins (or there abouts, as they vary by brand).
Includes the tins mentioned above, along with Terrys chocolate orange segments, Wine Gums, Jelly Babies, Malteasers, (not sure of the prices of these ones, though I think some were even less).
At my store they were handing out vouchers, however at the till everything I bought went through with 20% off before I even mentioned the offer.