Companies Act 2006 - chairman's casting vote accidentally abolished?

If your articles of association provide for a chairman's casting vote at general meetings and your company was formed before 1 October 2007, it seems you need take no action. The only exception would be if you had amended your articles to remove the casting vote on or after 1 October 2007 and now wish to reinstate the provision.

You may do so at any time by appropriate special resolution (but note that the only effective change is to restore the provision which was removed, not any other wording).

In other cases, if you are concerned that your articles do not provide for resolving tied votes on ordinary resolutions, you may need to consider alternative provisions with your legal advisers.