It comes amid claims police waited two weeks to look for potential witnesses to Ms Bulley’s disappearance.
A local angler has said that Lancashire police only contacted a fishing group on Monday of this week to check who was at the River Wyre at the time she vanished.
Ms Bulley’s partner is becoming “frustrated” with the police investigation, according to Peter Faulding, the forensic investigator who is supporting the family.
Ms Bulley disappeared while walking her dog, Willow, who was found running loose nearby with its harness on the ground.
Police believe Ms Bulley fell in the river, but a specialist search team brought in on the insistence of the family failed to find any trace of the missing dog walker.
Officers have been heavily criticised for their handling of the investigation and only began inquiring about anglers who were ticketed to fish on the river this week.
“The police have called up the local club,” said one angler. “I heard they were asking about day ticket sales, what stretches of water the local angling club owns, what stretches of water they lease, how many members were fishing that day.
“It sounds like they are trying to work out if anyone was fishing on the river that day and if they saw something, but nobody did.”