@iamshaky 

This should work just fine. Connect switch to one of available ports of Satellite Deco, and connect Playstation to switch to test that it works. It should. Then, plug everything else to switch you want to.

@Alexandre. 

Thank you so much for the prompt response

Will the primary Deco still act as a router as I do not want to lose the functionality

Thanks

@iamshaky 

I may have spoken too soon: your diagram should work just fine with any regular wired devices such as desktop, laptop, Roku, Android TV and Android set top box, printer, etc.

I am not familiar with Hive and Hue. For these I won't know, but if they work when connected to regular ISP router, they should work in your network diagram.

I sense your reluctance to just try: is it because you don't have 8-port switch and don't want to buy it unless you know it'll work? Then, you can test it without switch: your Satellite Deco has 2 Ethernet ports, you can connect up to two wired devices directly to Deco. If they work as supposed to, they will be working just fine when connected to same Deco through the switch.

If you want even more comprehensive test, use your second Satellite Deco with its 2 ports: in total, you could connect 4 wired devices to your two Satellite Decos to see if they all work together.

@Alexandre. 

Thanks

I have a switch and it is also a TP-Link.

I don't think I am reluctant to try - maybe just being cautious a little, and also working out where my switch would be best placed.

I will try with a spare device if I can find one....