Initially, the Department for Transport (DfT) proposed to create the HS2 in two phases: Phase 1 being from London to the West Midlands (including Birmingham) and Phase 2 taking the line further North. In 2015, Phase 2 was split into two stages: Phase 2a will be from the West Midlands to Crewe. And Phase 2b will have two legs: one from Crewe to Manchester and the other from the West Midlands to Leeds and South Yorkshire.
The map on the right uses magenta for Phase 1, yellow for Phase 2a, red for Phase 2b.

Because the Department for Transport (DfT) provides separate data files for Phase 2a and Phase 2b, this web site now has separate web pages for Phase 2a and Phase 2b.

You tried to access the web page at
http://barry.thehs2.com/phase2/maps
If this web page is for a place between the West Midlands and Crewe, then try this phase2a link; otherwise try this phase2b link.

Or you can access the separate web pages for Phase 2a and Phase 2b using the menu on the left.