The video submitted by tonyav states; clear glass tends to stay within the UK so it can be made into new jars or bottles, for say jam or whiskey.
I know I'm being pedantic, but whiskey, with an 'e', is not produced in the UK, is it?. It's produced outside the UK in places like Ireland or the United States of America. I'm surprised British Glass let this error happen in their film. Someone should have noticed this mistake before the film was released.
And before you reply, yes, I am in the process of getting a life!