So is the switch to connect via the homeplugs to the SKY router? The switch will enable up to 4 devices via the homeplugs.
The limiting point I can see is that the switch is only a 100BaseTX device so you wouldnt be able to transfer anything faster than that. Not a huge problem unless you do big transfers over your internal network.
Strangely the homeplugs, rated at 500Mb/s, claim not to be gigabit capable (the TL-PA511 is) - how on earth do you transmit 500Mb/s without gigabit?
The Openreach modem is only 100Mb/s so you will not have higher than that into your home for a good while yet.
So it should be fine. You have not fallen down the trap of looking for a router - you don't need one.
BT Infinity 2 - IP profile 77 / 20 - super fast!
Previously BE Unlimited - 21,000 Download 1,200 Upload but then moved house - 6,500 Down, 1Mb/s up - gutted!
Ex <n>ildram , been to SKY MAX - 15,225 Download