Complex sentence: Alan Simon Crowcroft is currently the Constable of St Helier which means he is both head of the Regional Administration, the Municipality of the Parish of St Helier and represents the Parish in the States of Jersey.
Split into simpler sentences: Alan Simon Crowcroft is currently the Constable of St Helier. As head of the regional administration, the Municipality of the Parish of St Helier, he also represents the Parish in the States of Jersey.