The new Departures passenger security area has just opened and boy is there a queue. Going thru security has gone from a 2 to a 20 minute ordeal. Give yourself plenty of time
Don't expect any help from the staff, if you can find any. They claimed they couldn't contact the baggage area, even though security told me they can as it is there job!
Very poor signage. You'd need to go downstairs if arriving from the train to check-in, then go upstairs again to the departure lounge. Airport needs a redesign.