Thank you for your post.
Tried that last week, didn’t help at all.
As it appears to be just wireless connected devices that are affected, there is not much that BT can actually do about it. Its possible that in the evening there are more sources of wireless interference, especially if you live in a built up area.
Which BT home hub are you using?
Yes we have tried that.
we have been away for the last four days.
so will see what happens today.
Thanks for getting back @bsg1972 .
You might want to check out What is the wireless mode feature on my BT Smart Hub? (assuming you have the smart hub). Also take a look at Improve your wi-fi with BT - a checklist.