I totally agree! It should be included in the curriculum! I know of a few primary school's around my way that have started to teach kids BSL, or at least Makaton!

The school i used to take kids to in Brighton was constantly using sign language, but one of the girls who then went onto college in Newbury was telling me that they are not allowed to use sign language during school time, only in breaks and there own time (as its boarding school) Which i thought was a fantastic way to help them to learn to communicate in the hearing world, she has changed so much since going there, her speech has come on in leaps and bounds and her lip reading is even more spot on than before!