First submission, hope it shows up ok!
This is a deal I was sent via email from Eurotunnel, it's £44 return per car for a weekend trip.
"Fares cover car and all passengers
To make the most of your journey, book our great value overnight fare. It's ideal for the same price as a day return you can stay away for up to 2 days.*
To get our best fares, book early and travel at the quieter times"
"You must return before midnight on the second day"