Wielding a baton or throwing chairs, tables, bottles and pint glasses at terrorists will do if you have nothing else but bare hands, but a Boer War era Webley Mk IV .455 caliber revolver might have proved right handy to some of the victims who were injured or slain with knives.  Pity your average British subject relinquished the right to keep one as a handy defensive weapon since 1997.