Artie Fufkin
I think the answer is both, LGW is capacity restrained at peak times, so night stopping aircraft or based aircraft will only form part of the picture i understand 4 based unit for the New Year growing to 6 or 8 later in the year, although this may include the 787.
I think any growth in the UK outside of LGW will take the same pattern with Spanish based units flying to/from the UK, it may come this Summer (2014) but i would be very surprised not to see TFS on sale in the Midlands/Northern England an Scotland by mid year for next winter 14/15, early departures from the Spanish mainland work well because the time difference means your landing after the first wave of based aircraft and attractive outbound times for punters, people seem less worried about arrival times when coming back home, i would guess that the recently announced Tui charter work at LGW would probably extend Northwards, Norwegian have a massive charter operation in Scandinavia.