A couple of sharpening opportunity arose today and so I tried just using water, it seemed to do the job perfectly fine, I just ensured the plane irons were dried afterward and coated with some camellia oil.
I've tried the WH camellia oil for honing but found it too thick like Rob did. I've been using Honerite but it seems to need constant re-application. It's probably not an issue if you are just maintain an edge, but I was prepping a number of chisels and plan irons and I seemed to be going through it at a rate of knots.
Thanks again for everyone's help, I'm tempted to try the baby oil mix as I am just a little nervous that I'll be seeing rust tomorrow having used water today, but I guess waterstone users don't have any issues.
Best wishes,
RW