Yeh I always forget when it comes to quorn sausages. The same with Linda McCartney sausages - I always thinking they're all syn free (when it's only the Red Onion & Rosemary ones that are syn free).
Not sure if they have changed recently, but this is what they are now
Quorn Sausages (42g) each - 1 Syn
Quorn Sausages (37.5g) each - 0.5 Syn
Quorn Low Fat Sausages (50g) each - Syn Free
Hope that helps