Unexploded World War II bombs and London buses: you wait for ages for one, then two show up at once. A day after the Hammersmith & City, District and Circle lines were disrupted by a UXB found in Bromley By-Bow, another one has been unearthed, this time at the Olympic site in Stratford.
All flights into and out of London City Airport have been halted due to an enforced air exclusion zone; however, the airport's terminal remains open. Passengers are being advised to contact their airline directly to check the situation.
7pm update: Flights in and out of London City have resumed, but naturally, delays are likely to continue into the evening. Phoning your airline and finding out what's happening still sounds like a decent course of action.