BT Openreach is warning its broadband customers that the UK riots are causing delays to its broadband repair and upgrade work.
The provider has declared a national status of Matters Beyond Our Reasonable Control (MBORC) for any area of the UK where unrest has affected telecoms infrastructure.
This means that during this period essential repairs will take precedence over broadband provision and upgrades, which will be given lower priority.
"There has been some impact on the service we are able to provide our customers, including missed appointments, where our engineers have been unable to access affected areas," the provider said in a statement.
"In these exceptional circumstances, it may be necessary, in certain areas, to focus our restricted resources on repair rather than provision to ensure you have service."
The company added that for the rest of this week at least, there will be between 500 and 1,000 jobs outstanding each day, and many would have to be re-appointed.
Violence began in London on Saturday evening, spreading throughout the capital and to other UK cities.