Part of the macabre joys of mileage running is seeing how you can deal with all sorts of chaos thrown at you. I remember having to run the entire length of Phoenix airport in 10 mins to catch the last flight to Honolulu and feeling the pain for 2 days afterwards.
But doing tier point runs to Amsterdam is nice and easy. In fact it's recommended as one of the ideal locations for new tier point runners to get acquainted with ‘the hobby. Below I have embedded a video from a TP run I did earlier in the year.
The key to all of this is the plane you go back to London in the same plane as the one you arrived. A far cry from the ‘direct' flights you sometimes hear about in the US where two flights might share the same flight number but you have to change planes and maybe walk across the terminal to get to your onward flight.
(As a side note, I have now included the above video in the “beginners' guide to AMS-JER tier point runs“)