If I travel from the UK to France at the moment (20/03/2020) I need to provide proof that I am on an 'authorized outing', as per the regulations here:
https://www.gouvernement.fr/en/coronavirus-covid-19
I have booked a Eurostar train from London to Brussels; the route, of course, goes through France for a short period. Eurostar have texted and emailed me to say that these restrictions hold, but it's unclear whether these rules apply only to their trains to France. Do I still need a certificate to comply with the French government's rules even if I am going directly to Belgium?