Urm sorry to spoil the party but who says 3km VDSL2 will get a speed of 10 to 12 Mbps?

Generally at that distance you are looking at not being allowed to order it, or only getting marginally more speed than ADSL.

That's good. That's where extensions should be wired from, and where the ring wire from those connects. Your plug-in extension for the bedroom almost certainly had a ring wire, and most are also poor quality cable and introduce noise as well.

OK. I was being very pessimistic (this is what nine years of campaigning for rural broadband can do to a man)

I've just measured it on Google. As the crow flies, it's 524m from house to cabinet. This is a higgledy piggledy village, and the telephone cables skirt around its edge, in which case the line length would be about 850m. There's no surefire way of knowing, but I'll traipse across the field and try to follow the line as closely as I can tomorrow.

Better than 3km - fair point, Andrew!

At 850m then 25 to 30 Mbps is the window you are looking at probably

The checker will update with the Openreach speed range once the service is ready to order.

Just to add to what others have said, that is just an external junction box, and all looks fine. from there it's a straight pair to the rear of the NTE, all as expected/hoped for.

Let us hope it is 850m back to the cabinet, and not 3k eh !