Complex sentence: In June 2015, he was one of 125 MPs who employed a relative; his brother worked as a communications manager and was authorised by Monaghan to be paid 225 hours of overtime payments during one financial year.
Split into simpler sentences: In June 2015, he was one of 125 MPs who employ a member of their family. Monaghan employs his brother as a communications manager and authorised 225 hours of overtime payments to him during one financial year.