Powerline adapters not working after upgrade to fibre

Hi

After many months of waiting to get fibre (Spark) installed and running, it finally happened the other week - prior to this I had Vodafone VDSL with predominately a wireless setup. Trying to eke out some more speed (for my boys' gaming and Sky) I put in some powerline adapters (TP-LINK TL-PA4010P) which connected flawlessly. Since my fibre upgrade they no longer work. When these worked they had all the three status indicators lit, which are power, internet/network activity and connection status. They now show only the power and connection status.

Has anyone else experienced or know of this and if so is there a solution / workaround I could try?

Thanks in advance.

Rich