Offa's Dyke Path temporary diversion at Trevor, Wrexham County Borough. Tuesday 18th September to Friday 21st September. Due to essential maintenance work to be carried out by Wrexham County Borough Council, Offa's Dyke Path National Trail ( between A539 at Trevor ( GR SJ264422 ) and canal bridge 33 ( GR SJ264422 ) will be shut for the 3/4 days above. Notices will be in place to assist path users navigating the official diversion. CLICK here for pdf. of section closed and diversion route.