Senior British police officials have expressed concerns about the growing threat to the UK. They mention that various groups are utilizing online platforms to carry out threats. Islamic extremism is still considered a major concern, but other threats have been rising.

Threats from certain countries and far-right groups have increased significantly over the past five years. Details about these threats are available from British police officials, who are seeking cooperation from technology companies to address the issue.

Further information can be found through the original source, which provides more insight into the concerns of British police officials regarding online threats to the UK.