The use of BYODs for official work resulted in various kinds of data security and privacy risks. The NCSC guidelines are aimed at helping organizations deploy and manage BYODs.
"The increase in remote workforce encouraged several organizations across the globe to embrace the Bring Your Own Devices (BYODs) concept. However, using personal devices for official work also brought in various kinds of data security and privacy risks, as organizations lacked visibility to secure these unmanaged BYODs. With the rise in the security issues related to BYODs, the U.K. government recently released guidance for organizations on enabling staff to use their personal devices such as smartphones, tablets, laptops, and desktop PCs to access corporate data..."