Drama: Red Lines Radio 4, 2.15pm

Toby Stephens (right), Nicholas Boulton and Jon Culshaw head the cast of a revealing tale penned by Craig Oliver, David Cameron's ex-head of communications, and historian Anthony Seldon. It focuses on how, in 2013, Vladimir Putin outmanoeuvred Prime Minister Cameron and President Obama over matters unfolding in Syria.

Sunil Patel: An Idiots’ Guide To Cryptocurrency (Radio 4, 11pm) is a new four-part series following the comedian's efforts to get rich quick.

Choral Evensong (Radio 3, 4pm) comes live from Durham Cathedral and features music by Edward Bairstow and Richard Lloyd.