I had the issue in July with slow-loading of certain pages and after contacting Lit they disabled IPv6 on my router and that fixed it. Approx 7 hours following the planned outage, the issues came back again. About the same time I had an email from Lit following up on my July email saying they believed they fixed the IPv6 issue and was I seeing any problems? I reported back that the issues were back, and they said 'Unfortunately this did not have the desired effect, and we will continue to investigate and work on permanently resolving the issue.'. I got them to disable IPv6 again whilst they worked on the fix, which they did, and things are working as normal again for me in Gloucestershire.