From: Anthony Mayfield <info_at_aplossystems.co.uk>
Date: Tue, 22 Oct 2013 08:42:58 +0100

I'm sorry, it seems the mere writing of these emails gives me the answers
I'm looking for. I realised that the constructor for the factory is called
much earlier but after the WebConfig is instantiated, I've therefore
overridden the value there.