For queries about your TalkTalk broadband service.
yesterday
Internet appears to work normally, but cannot connect to any of the three breweries I routinely order from - Nirvana, Greene King, and Adnams. Three can't be coincidence. Various 'reasons', but mostly 'the connection was reset'.
yesterday
I wonder if these sites may be being blocked somehow because they require age verification? A number of posters have reported such as gambling sites, including the National Lottery being blocked.
Try changing your DNS server settings:
https://community.talktalk.co.uk/t5/Articles/Using-3rd-Party-DNS/ta-p/2205279