Simplify the following text for a Grade 3 native English-speaking person.
Original: It is the center for Wiltshire Council , a unitary authority created in April 2009 which replaced ( for relevant purposes ) West Wiltshire District Council and the former Wiltshire County Council .
Simplified: Trowbridge is a town in Wiltshire , England . It is the county town of Wiltshire as it has a county hall .