Thanks for posting and welcome to the community
Sorry to hear about the problems you're having since upgrading, I appreciate this is disappointing. How did your engineer visit go? Is there anything you like me to test or check for you?
Hope to hear back from you soon,
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Thanks for getting back in touch and apologies you are having an issue with your broadband speeds during the evenings.
I've taken a look at the network and there is an issue with high peak time traffic fault in your area.
To discuss this further, I have sent you a PM (purple envelope icon, right corner) with some additional information.
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