It’s on Eurostar website
I wonder how long it will be before the Foreign Office get round to updating their travel advice.
When I travelled to France at the end of November last year, the (rather bored looking) French immigration officer at St Pancras didn't look at the vaccination certificate or the "declaration sur l'honneur" form regarding having COVID symptoms.
So the restriction was pretty pointless anyway.
Now all we need to do is to get Eurostar to drop the following message
For everyone’s comfort, we recommend wearing a mask on board our trains.
They are flogging a dead horse, and I certanly won't be wearing one when I travel to Lille next month.