We are running a form on all article pages for the user to record which article they have read.
The same form is displayed on each article page. The form includes a form field for the users email.
We have tried to include a hidden field to auto-populate the URL so that we can then send an email to the user as a record of when they viewed the article, and which article they viewed.
The only place I can find the data is in the activity of the user, under Activity Type -> 'Fill Out Form'
How can I use this data in an email? I have found info on {{trigger.referrer}} but this is not a token in our Marketo instance...
You want the token {{trigger.web page]}.
Note: Marketo will strip the protocol (http: or https: followed by two slashes //) from the start of the URL, as well as stripping the query string. These are not particularly well-loved, but well-understood, quirks of this built-in token. 
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