The English Baccalaureate is a "performance measure which recognises the attainment of GCSEs in selected academic subjects". It was first announced by the government in late 2010 and would mean that attainment is measured by GCSEs at grade A* - C in five areas: English, Maths, Science, Languages, Humanities (either History or Geography).
Bacc for the Future is a campaign to renegotiate these current plans so that the EBacc includes a 'sixth pillar of creative subjects' such as Art, Music and Design & Technology and ultimately to save creativity in schools. Creative subjects need to maintain their place as a core part of the curriculum in order to ensure the health of the future creative sector and to provide children with a rounded and rewarding education.
The link above provides more information and a shortcut to signing Bacc for the Future's petition.