RADIO CHOICE

CHRISTOPHER SOMERVILLE explores the lanes and back hills of Britain, and writes about the things he discovers. His accounts are a source of inspiration and information to other walkers. For this week’s RAMBLINGS (RADIO 4, 3PM), he takes Clare Balding for a ramble along the English side of the River Severn — a place of lost industries, scuttled boats and big skies.

THE galaxy, it has to be assumed, is full of beings unable to learn from their past mistakes. Even the gods find it hard after an eternity of strife and misunderstandings to ‘tone it down a bit’. Zaphod Beeblebrox (Mark WingDavey), former President of the galaxy is not a creature to worry about his past mistakes, so, in the fourth episode of the sci-fi comedy THE HITCHHIKER’S

GUIDE TO THE GALAXY: HEXAGONAL PHASE (RADIO 4, 6.30PM),

he makes his way to downtown Valhalla to share a drink with Thor (Mitch Benn, pictured with WingDavey). Thor, however, is still brooding about what happened the last time the two of them got together. n RADIO 3 IN CONCERT

(7.30PM) has the choir Ex Cathedra singing music for Holy Week — including Charpentier’s The Denial Of St Peter, Palestrina’s Novella Aurora and Monteverdi’s O Jesu Mea Vita — in a broadcast from St John’s Smith Square.