Wikipedia:Articles for deletion/Buckingham Palace incident
There is http://www.bbc.co.uk/news/uk-42690957 continuing coverage which tells us that there will be an Old Bailey trial in June.  That will trigger another round of coverage and so this discussion is premature.  If we look at historical precedent – cases such as Edward Oxford – we see that they stand the test of time.  In any case, there are reasonable |alternatives to deletion such as merger with pages such as List of people who survived assassination attempts
— user:Andrew, 17:06, 9 April 2018 (UTC)
Stance: keep
Cited policy: WP:ATD (Wikipedia:Deletion policy)