Philip Larkin
www.poetryfoundation.org/poets/philip-larkin
An overview of Larkin's life and work.
The Philip Larkin Society
Website of the Philip Larkin Society, with articles and updates about new scholarship regarding his work.
Philip Larkin
https://www.poetryarchive.org/poet/philip-larkin
More information about Larkin's life and work, plus recordings of him reading his work.
Philip Larkin and Me: A Friendship with Holes in It
https://www.newyorker.com/books/page-turner/philip-larkin-and-me-a-friendship-with-holes-in-it
An article by Andrew Motion, who wrote a book on Larkin, about their friendship.