of carving from satellite imagery in antarctica, so it is quite hard to tell if the frequency of carving events is increasing. we do know that ice fronts in parts of the antarctic peninsula are further back than some of their historical locations. the survey will continue to track a74 and the behaviour of the brunt ice shelf. it is entirely possible the big berg s gentle embrace delivered some unseen damage. if that s the case, the expected breakaway of unstable ice could yet happen in the days ahead. jonathan amos, bbc news. the deputy leader of a london council responsible for the ballooning costs of the marble arch mound has resigned. melvyn caplan stepped down immediately after total costs nearly doubled to £6m, up from a forecast of £3.3m. ticketholders were offered refunds for the artificial viewing platform