Heritage Open Day: Four separate and different talks about the history that underpins today’s shape and nature of four ancient churches. St Martin, St Petrock, St Pancras and St Olave are four ancient churches each with a unique story to tell. Churchwarden Keith Walton will explain how the church buildings we see today have been shaped by the events and beliefs of the past. There are four separate talks - about an hour - one for each church, held in that church.