Off the Shelf Festival of Words
Ottery St. Mary Coleridge Literary Festival
Oxford (Sunday Times) Literary Festival
Palestine Festival of Literature (PalFest)
Petworth Literary Weekend, West Sussex
Plymouth International Book Festival
Poetry-Next-The-Sea Poetry Festival
Pop Up Festival (various locations as the name implies!)Pow-Wow Litfest (Morely)
Proms at St Jude's Music and Literary Festival (Hampstead, London)
If you are involved in this festival you can update or change details via the organisers page . Authors can list here.