After extensive research, these are our findings.
Malted Milk
The Malted Milk is the ultimate in Nan biscuits. "Will you have a biscuit?" she asks, pouring a cup of tea. Out of the corner of your eye you see the treats tin. Maybe she's made shortbread. Maybe there's a fairy cake in there. Oh dear. It's not. It's a few Malted Milks, and they've gone a bit soft. Brilliant.
Source: images2.mysupermarket.co.uk
Pink Wafer
Let's not even get into the argument of whether it's a biscuit or a cake. The fact remains that this snack is a disappointment. It can't withstand dunking, it clings to the roof of your mouth, and it tastes like air. Terrible.
Source: goodtoknow.media.ipcdigital.co.uk
Rich Tea
A Rich Tea biscuit punches far above its weight. Add a smear of butter and it's a far classier snack than it ought to be. Still no big hitter, but nothing to sniff at either.
Source: poundland.co.uk
Ginger Nuts
Ginger nuts are the Steve Carell of biscuits. They are reliable. Nobody will mind if they're there. They will complement most beverages. Everyone likes them, but few people love them.
Source: nexpressdelivery.co.uk