Unlike many organisations, the BBC has a very enlightened policy on leaving old content up on their web site.
Among other things, it says:
Our view is that these pages often contain a lot of information about the programme or event which may be of interest in the future. We don’t want to delete pages which users may have bookmarked or linked to in other ways.
In general our policy is only to remove pages where the information provided has become so outdated that it may lead to actual harm or damage.
If only more web sites took this view.