Very slow WiFi speeds since full fibre installed

[Lynne060456]

Just over three weeks ago we had full fibre installed and since then I've noticed the speeds just browsing the internet or social media to be extremely slow at certain times of the day. Speed to the router according to sky is 109mbps but when I do broadband speed checks it varies wildly between 1mbps and around 50mbps but is often around 8 or 9 mbps which is slower than it was prior to having full fibre installed. 

Here are the stats from the router as recommended from another post here:

Any advice welcome. 
thanks 

[Tom-W19]

Hi @Lynne060456 

Your post has been escalated to our Community Messaging team who will invite you to a private chat shortly and help you with this.

Just look out for the chat bubble to start the conversation.

Here's more information on how Community Messaging works - https://community.sky.com/t5/Did-you-know/Escalating-a-post-to-a-Sky-expert/ba-p/3711147

[Addie15]

Update-We are closing this session after no further response within 48 hours. If you still need help, please let us know so we can re-escalate this for you. Thanks.