The car park at Grogley is currently fenced off and shut due to structural bridge work(you cannot get through I've tried), there is limited parking next to track leading to car park, you can then access the field below being able to fish the BAA water up to the Ruthern stream, the other alternative is to park at Polbrock bridge car park and walk/fish up to the Grogley car park area, if the river was low enough you could possibly wade across but given the current levels and forecast of whats to come that option seems a bit remote.