A group of urban explorers have sent a camera to the bottom of a collapsed mineshaft in a field earmarked for housing. On Friday evening, the group, from Burnley, who call themselves the Northern Monkeys, went to film down the shaft, which opened up in Baileys Field in Darwen last week. Since planning permission was granted for the site, off Ellison Fold Way, and proposals by Altham-based McDermott Homes for 343 houses submitted to Blackburn with Darwen Council, residents have expressed concerns over the integrity of the land, as well as their anger over the destruction of a well-loved recreational area.