I take it likea lot of people, you and your colleague didn't read your contract before signing it?
I was signed off for a month due to high stress brought on by my appauling manager.
After 11 days I had the HR director (looks and acts just like Catbert) phone to say if I didn't come back I wouldn't get any pay.
Thankfully I had enough in the bank to cover the loss.
Of course there was a clause that sick pay could be extended at manager's discresion, and you'd have thought that as my chest pains were caused by my manager's harassment, they'd have done the decent thing, but then again, they aren't a decent company.