the UK's deadliest biscuit

Worthy of comment:
the UK's deadliest biscuit has been found to be the Custard Cream.

the full list of the UK's riskiest biscuits, together with their 'danger' rating:
Custard Cream 5.64
Cookie 4.34
Chocolate Biscuit Bar 4.12
Wafer 3.74
Rich Tea 3.45
Bourbon 3.44
Oat Biscuit 3.31
Digestive 3.14
Ginger Nut 2.99
Shortbread 2.90
Caramel Shortcake 2.76
Nice Biscuit 2.27
Iced Biscuits/Party Rings 2.16
Chocolate Finger 1.38
Jaffa Cakes 1.16