I went with a friend and we caught a flight from Heathrow Terminal 1 (not 5 - phew!) on Monday morning last week. We'd used the online check-in system, and were very pleasantly surprised by how efficiently it worked. We arrived in Barcelona, and were checked into our hotel and out and about in the town by 2 pm.
Barcelona is a beautiful town with wide avenues that have a central
walkway as well as standard sidewalks. The architecture is quite amazing, and for me the highlights were the Gaudi buildings with their distinctive wibble wobble appearance (called organic). But that wasn't all. The museum, the art galleries, the sights and sounds on the street, and St. George's day - all will be revealed.