Simplify the following text for a Grade 8 native English-speaking person.
Original: The trains are part of a Â # 3.4 billion contract awarded by the now defunct Metronet to Bombardier to supply new trains featuring Automatic Train Operation and signalling for the Victoria and sub-surface lines .
Simplified: The trains are part of a 3.4 billion pound contract that was awarded to Bombardier by Metronet . The contract was to supply new trains featuring Automatic Train Operation and signalling for the Victoria and sub-surface lines .