@simonmc by the way, woo commerce sets the constant "DONOTCACHEPAGE" on cart and checkout pages (as well as order received and account pages)
You can check the header responses using something like "http://tools.seobook.com/server-header-checker/"
Just enter your cart page or checkout page
which would return something like;
"Cache-Control:
no-cache, must-revalidate, max-age=0
Pragma:
no-cache"
The only question is if falcon respects the constant "DONOTCACHEPAGE"