Can I activate my France Rail Pass in London?

Can I validate my France Rail Pass in London, when I take the Eurostar train (on passholder fare) from London to Paris?

I have purchased the Eurostar ticket at passholder fare, which requires my France Rail Pass to be validated, but I will be in London first and the Eurostar train trip is the first leg of my travel.

Please kindly advise.
2 people have
this question
+1
Reply