It is rare for exchanges to get congested, and it is usually fixed within a few weeks.
Evening slowdowns are more commonly due to the ISP have insufficient capacity to maintain a good service.
Which ISP/package are you on? The well-known baddies are Sky Connect, O2 Access and TalkTalk non-LLU, but yours may be one of the others.
Which exchange is it as well?
My broadband basic info/help site - www.robertos.me.uk
My domains,website and mail hosting - Tsohost
. Internet connection -
IDNet Home Starter Fibre. Live BQM
"Where talent is a dwarf, self-esteem is a giant."
- Jean-Antoine Petit-Senn.