But those slots previously used by Ryanair from LGW to BFS are remedy slots involved when IAG took over Aer Lingus and although they have returned to IAG I believe they are only to be used from LGW to either Belfast airport and not reallocated to another destination.
With the loss of Monarch I am sure there are enough slots available if Qatar decided to operate twice daily into LGW which I find hard to believe as I would assume at least a daily flight initially.