If your building owner is not taking action or intending to charge leaseholders for the remediation of a cladding system, you can notify the Building Safety Team at MHCLG using the leaseholder feedback form providing basic details of your building, the owner or managing agent, and the type of cladding you believe is present if known to you.
If you are concerned about a fire safety risk which your building owner or managing agent is not addressing, you should contact your local Fire and Rescue Service or Local Authority for advice.