JavaScript bookmarklet to undo a BT HomeHub's connection error page by visiting the intended URL. Visit page X, get taken to the error page, click the bookmarklet and you'll go back to X.

descrew-bt.js

/*
 * Save as the URL of a bookmark, and the next time your BT HomeHub takes you to a
 * "problem with your connection" page, click the bookmark to go to the actual URL.
 *
 * This simply grabs the "org_url" parameter out of their error page and visits it.
 *
 * Useful if:
 *
 *   1. You don't want to retype URLs or open tabs repeatedly while checking to see
 *      the connection is up again. Just keep clicking the bookmark.
 *   2. You open a browser that loads your previous session (with a bunch of tabs),
 *      but you're actually disconnected. The Hub will take you to error pages.
 *      Once you're back up, repeatedly Ctrl-Tab and click the bookmarklet to get
 *      all your pages back.
 */

javascript:function getParam(a){var b=window.location.search.substring(1);var c=b.split("&");for(var d=0;d<c.length;d++){var e=c[d].split("=");if(e[0]==a){return e[1]}}}if(window.location.host=="bthomehub.home"&&window.location.search.indexOf("org_url=")!=-1){window.location.href=decodeURIComponent(getParam("org_url"))}