Complex sentence: After Arriva Southend decided to withdraw the then 721 service in 2001, Stephensons took over, providing the Green Line routes X1 and X10 coach services, branded "London Link Express".
Split into simpler sentences: After Arriva Southend decided to withdraw the then 721 service in 2001. Stephensons then took over, providing the Green Line routes X1 and X10 coach services, branded "London Link Express".