Complex sentence: E2BN's Protex web filtering system received full Becta accreditation in 2007 and 2010/11 by blocking over 90% of all inappropriate material.
Split into simpler sentences: E2BN's Protex web filtering system received full Becta accreditation in 2007 and 2010/11. It claims to have be able to block over 90% of all inappropriate material.