Room 85 is made by a G&P teacher based in Exeter. It is a good site for long term info but he purposely doesn't put his most up to date info/ examples on the site. (Fair enough - he worked hard to put his notes together, it's his call).
So use them, but remember you'll have to find how things have changed since about 2003 and add those on top. In doing so, you'll be a better G&P person.