Because the Scottish and English school summer and half-term holidays are different you often get passengers crossing the border to get cheaper fares. If anything it probably helps Newcastle by spreading out demand. If you fly to a holiday destination from NCL in early July you will find lots of people from Scotland on the plane. Re Easyjet I don't think they have done a good job from NCL, especially as there is not the same amount of direct competition from Ryanair as say Belfast, Edinburgh and Glasgow.