12/07/2026
***UPDATE: We have so far found the Firefox web browser allows us access to the TLS site (other web browsers we tried which didn't work: Vivaldi, Ecosia, Brave, Chrome, and MS Edge ***
For applications inside the UK, there is an ongoing issue with the TLS website. An eternally turning wheel, which doesn't then allow appointment booking, document upload, etc.
However, we have found that switching to Google Chrome (from Microsoft Edge) seems to work. Other immigration colleagues report that this made no difference for them.
Our suggestion would be try multiple different web browsers until you find one that works. Hopefully TLS will fix this in due course.