1974 Tower of London bombing
The 1974 Tower of London bombing happened on 17 July 1974 with the explosion of a 10–14-pound (4.5–6.4 kg) bomb in the White Tower of the Tower of London. The blast left one person dead and injured 41 people, with many having lost limbs and suffering severe facial injuries.
Source: Wikipedia — 1974 Tower of London bombing (CC BY-SA 4.0)