the 225 is carrying about 140,000kg stage equipment to Lagos for a concert with Snoop Dogg, Beyonce, Jay-Z, Missy Elliott and Busta Rhymes
http://www.manchestereveningnews.co.uk/news/s/224/224615_worlds_largest_aircraft_is_in_manchester.html
it is holding in africa, whilst they have the concert and is then returning with all the equipment, so if you want to spot it properly, it will be returning in about a week or so.
hope this helps