I’ve been spending some time happily navigating around this website, which has archived pages from Ceefax and Oracle, as well as other teletext providers. Each link takes you to a specific day, with all the pages accessible for viewing.
You may need to try a few browsers to find which one works best (I couldn’t input page numbers with IE, but everything worked fine with Firefox). Navigation is simple – use the number buttons to input the page number you want, whilst the cursor keys left and right cycle you through the pages (if there’s more than one available on that page).
For anyone who used the service, there’s an undeniable nostalgic rush in viewing this relic from a bygone age. Lovely stuff!