@ESZ I thought that I would follow this up wth TP-Link's support but this seems to have been a waste of time. Rather than acknowledge that there is a flaw in one of their products offerings they...

@Beemer I have had the same issues using Powerline adaptors TL-PA8030p 2.0 and TL-PA8010P 2.0 all at latest firmware levels. I noticed no real difference in performance with the Lower PLC-to-VDSL...

Till now I have had NAT Boost disabled on the basis that with it running it conflicts with QoS, DoS Protection and Traffic Monitor. The Traffic Monitor is actually pretty poor at showing traffic flow...