Surfaces. tonight the organisations chief executive apologised and explained what initial investigations into the cause at brown.— initial investigations into the cause at brown. our systems received — cause at brown. our systems received some _ cause at brown. our systems received some data - cause at brown. our systems received some data on - cause at brown. our systems received some data on an - received some data on an aircraft and it was unable to process it. it's incredibly rare, we process millions every year, thousands every day. in the circumstances where that happens this is safe...