London city and Gatwick 2015, sometime in the year!!!!
Aer Lingus fuel issue is due to their company fuel policy. They fuel for the whole point merge arc, when in reality the point merge arc is just a RNAV vector/lateral hold. Thus this part of the route should be part of an airlines 'contingency or vectoring' fuel allocation. Discussions are ongoing with other airlines also to overcome this issue.
Been interesting to discover how airlines have adapted the amount of fuel they carry into the london TMA, depending on which airport and what time of the day they are landing. Not all carry 'holding' fuel however the ultimate decision what to carry isup to the captain.
Weather and point merge???? Exactly the same as a hold and weather, or any other route and weather. Nothing flies the specified route, or allocated heading, flow control, MDI's, etc all come into play.
Hope this info helps.