Flew out of LHR last week , and was given ( no charge ) an emergency exit seat .( 64A ) Spoke to a few passengers scattered about the empty A380 and not one paid extra for their ( blue coloured ) privilege seat . A couple sat in row 40 at the front of the airbus ( black coloured ) had paid £160 extra per seat . This to me seams to be a non starter because after you have paid extra for the ( blue ) privilege seat , you are then given the option of paying more to have the seat (or seats ) next to you blocked ....So say for example I payed extra and booked 43a and blocked 43 b&c , but Mr Y deceided he wanted to sit in 43c and block 43b , but Mr Z came along and insisted ( I don't know why ) on sitting in 43b , where do myself and Mr Y go , probably to row 72 which was free anyway , and then charging us both for one blocked seat , but not the privilege seat , leaving that for someone else to pay for. ...A TIP FOR ALL , pre book your seats in the no-extra charge brown area , and about 12 hours before the flight departs , pull up the seat map ( by now you will have a good idea how full a flight is ) and move yourself around accordingly . If the flight is full , you've pre booked your original seat , so stay where you are , if it's empty ( like mine was ) move yourself around , or get lucky ( like I was ) with an upgrade .