A curious history of Christmas

Historians Sam Willis and James Daybell, creators of the Histories of the Unexpected podcast and books, offer a distinctive take on festive traditions, which takes in violent Christmas cards and obscene snowmen. Historyextra.com/podcast

Secrets of the river

Lara Maiklem, author of Mudlarking, describes some of the fascinating historical objects she has discovered while scouring the banks of the Thames. Historyextra.com/podcast