Pee
Norwegian have similar market shares at both Helsinki & LGW (12% & 13% respectively) the difference is that in the last 1/4 of 2014 the Helsinki market was 3.8m passengers whilst at LGW it was 8.3m passengers
Yes its a big, very big easyJet base but Ryanair's presence is very small, its this market size that drives the volume, plus the UK economy is the fastest growing in Europe