In the free Tesco Magazine, there is a coupon for 10 extra Clubcard points when you buy a bar of Galaxy Bubbles (31g bar).

Not sure how much the chocolate is.

Coupon is on page 117, and states one coupon per product purchased, and coupon can only be used once. So should be able to by several bars and redeem a coupon for each.

Also on front page there are coupons for:
50p off four pack of Cushelle T/Rolls (Formerly Charmin)
30p off any Dairylea Cheese Triangles or Spread
50p off 125g Caprice des Dieux Heavenly creamy cheese
and a coupon for a chance to win a £100 Tesco giftcard.