The Fire Brigades Union (FBU) has criticised the proposal to scrap target response times.
New shift patterns since 8 April have been criticised by the Fire Brigades' Union (FBU).
The Fire Brigades Union has described the rescue effort as the "biggest in peacetime Britain".
The Fire Brigades Union said the move would mean firefighters would be "imprisoned at work".
The Fire Brigades' Union (FBU) said the cuts are "reckless" and will jeopardise public safety.
The third walkout by members of the Fire Brigades Union started at 09:00 BST.
The fire service and the Fire Brigades Union (FBU) is also conducting an inquiry.
BBC: Shirley Towers fire: No police charges over firemen deaths
Andy Vingoe, chairman of the Fire Brigades Union in Suffolk, said this concerned him greatly.
Volunteer fire brigades are unlikely to have the training to deal with big or complicated fires.
Paul Trew, secretary of Hampshire Fire Brigades Union, said he needed time to thoroughly review the report.
But Trevor French from the Fire Brigades Union said it was "unacceptable" to ruin firefighters' family lives.
Steve Gould, of the Fire Brigades Union, said at times Bromsgrove crews would be "doubling their workload".
BBC: Hereford and Worcester fire cuts 'will double workload'
Members of the Fire Brigades Union (FBU) are not working overtime and are refusing to cover staff shortages.
But the Fire Brigades Union said it was against employment law and would put public safety at risk.
Although the structural problems have been fixed, the Fire Brigades Union (FBU) has previously raised concerns about the CARPs.
They claim the Fire Brigades' Union is standing in the way of co-operation.
Fire Brigades Union members have staged a series of strikes in the capital.
BBC: Campaign to reinstate London firefighter Sian Griffiths
Two West Country fire brigades are in talks over merging to save money.
Last week, the Fire Brigades' Union said the proposals were "dangerous and wrong".
The Fire Brigades' Union (FBU) urged Londoners to save the service from "reckless cuts" by taking part in the consultation.
BBC: London Fire Authority agrees to allow cuts consultation
The Fire Brigades Union (FBU) said it had just agreed to new working patterns and would fight the latest changes.
BBC: Cambridgeshire firefighters set to oppose closure plans
Chris Argent, from the Fire Brigades Union (FBU), said he was not surprised by the rise but it was "still cheap".
Members of the Fire Brigades Union claim bosses have failed to act over failings in training and development, risking firefighters' lives.
BBC: Grampian fire chief concerns for Highlands fire service
The Fire Brigades Union said it was "deeply concerned" by the news.
But the Fire Brigades Union said the plan would "endanger public safety".
The Fire Brigades Union (FBU) said lives were being put at risk.
BBC: South Yorkshire fire service misses response time target
But Tam McFarlane, from the Fire Brigades Union, said there was "a very real sense of anger" among members over the decision.
BBC: Devon and Somerset Fire and Rescue faces ?5.5m budget cut
False alarms to fire and rescue crews are "draining" resources and increasing the risk of danger during real emergencies, fire brigades say.
The Fire Brigades Union (FBU) said such moves would not improve services.
Three London fire engines have been unavailable for use because they were left "outside and unattended" during strikes, the Fire Brigades Union said.
应用推荐