@Alexandre. Thanks, have made change you suggested, will let you know if this helps. If it is down to exhausting IPs through Mac randomisation, just surprised I didn't notice this before. It could be...

Hi all, Hoping for some suggestions to help fix my problem. Set-up 3 x Deco M9 Plus Main Deco is in router mode, connected to Virgin media hub around 20 devices using the network, iPhones, TVs,...