@Sunshine . I'll give the debug firmware a go tonight My ISP is Plusnet_VDSL and I am based in the UK. Hardware/firmware versions in my initial post

Note the router is a VR2100, not 2800 as the 2100 is not listed in the Model box! I've had the 2100 for since July and have found that it's started rebooting on a daily basis at around the same time...