WARNING!: Description below may be disturbing to some readers.

The Dunblane massacre was a school shooting that took place here at Dunblane Primary School in Dunblane, near Stirling, Scotland, on 13 March 1996, when 43-year-old Thomas Hamilton killed 16 pupils and one teacher and injured 15 others before killing himself. It remains the deadliest mass shooting in British history.

Following the killings, public debate centred on gun control laws, including public petitions for a ban on private ownership of handguns and an official inquiry, which produced the 1996 Cullen Report.  The incident led to a public campaign, known as the Snowdrop Petition, which helped bring about legislation, specifically two new Firearms Acts, which prohibited the private ownership of most handguns in Great Britain. The UK Government instituted a buyback programme which provided compensation to licensed owners.

More info here: https://en.wikipedia.org/wiki/Dunblane_massacre