Talking of how difficult behavioural change is we had signed up to visiting Urban Arrow's new facility in Amsterdam.
This our first trip out of Scotland since 2019.
We 'had' to take plane in one direction as timings on Sunday preclude train passengers from Scotland making the connection to Amsterdam train on way out.
Other factor was the fact this was first trip away since Bxt and Covid. You need to get Fit to Fly PCR test taken no more than 48 hours before you arrive. You need an NLGov Quarantine Declaration plus proof of vaccination. Plus reason for visit as cases still too high there.
We had visions of travelling to London to be turned away even if train was possible.
So KLM out and Eurostar + Sleeper back.
Left house at 2pm, tram to airport and got through the checks with 15 mins to spare.
Train from Schipol to Sloterdijk and in by 8pm (5 hours in transit, 90 mins on plane.
Return next evening. Leave UA at 16.50, walk to station and take train to Amsterdam Centraal. Search out Eurostar reception on Platform 15 - nothing flashy. Show UK Locator forms 4 page pdf and proof of day 2 Antigen tests. Dutch passport followed by UK Border outpost in kiosk to stop anyone Ukania doesn't want getting on train.
18.50 and into London at 21.57 (lose an hour). Run time for 220 miles just over four hours - yes East Coast line trains are faster. Mask obligatory but lots of coughing and food at bar running out. BrewDog IPA only, Heineken had run out.
Then change trains with 0.5 mile walk up to Euston. Caledonian Sleeper very comfortable for a train. Safer too and back into Waverley at 07.20.
Co2 stats pp
122kg KLM 737 - 15kg Eurostar - 33kg Caledonian Sleeper - trains all electric
Data estimates from http://www.ecopassenger.org
This all under business expenses as train obviously more expensive. For people in South of England Eurostar is no brainer.