Complex sentence: Demolition work at T.P Riley began towards the end of 2001 and lessons were taught in Portakabin buildings until the new school, known as Walsall Academy, was opened in September 2003.
Split into simpler sentences: Demolition work at T.P Riley began towards the end of 2001, and lessons were taught in Portakabin buildings. The new school, known as Walsall Academy, was opened in September 2003.