Not knowing who or what a 'Batti Wallah' is or was I Googled it and came up with this:
http://www.pandosnco.co.uk/engineers.html
I found it an interesting read and which might be of interest to some aboard the GD as we cruise for warmer climes albeit I don't think that it is what ES was referring to but. If we head for Victoria or NSW we won't need to worry about funnel smoke but, on the other hand, but we could perhaps help HMAS Choules rescue a heap of traumatised people off a beach somewhere. It's pretty sad down down here at the moment.
Could it be said that there is an element of 'Oil and Water' aboard the GD???????????
43C one day 20C the next in Melbourne (more or less anyway)