ON THE ROAD D

Monkman & Seagull’s Genius Guide To Britain, 8pm, BBC2 OUR genial brainboxes Eric Monkman and Bobby Seagull reach Wales (pictured) red) on the second leg of their educational tour. There, they spend the night in a library — bliss! — surrounded by former prime minister William Gladstone’s unique collection of books. Then, it’s off to the summit of Mount Snowdon, via the mountain’s iconic rack-and-pinion narrowgauge steam railway train.