Understood Ian, no need to apologise.
As for Dubbin vs Proofide, can you explain the difference? From what I have read, an excess of either is the cause of problems; nothing I have read has convinced me that there is any difference between the two.
Whenever I ask the question, the only answer I get is "just because it is", which you must agree is not convincing.
I'll say it again: Proofide is Dubbin. As such the exact recipe will differ from one brand to another, however there is no reason to spend nearly twelve pounds on a tin, when a four pound tin will do the same job.
Even Brooks admit that Proofide is Dubbin (quoted from their website):
"Q > I have a perfectly good tin of Dubbin. Would this be harmful to my Brooks saddle?
A > We recommend to use only Proofide [er... obviously], as we cannot know all ingredients of the different leather conditioners on the market. I guess that Dubbin could also work, if I trust what I found about it on Wikipedia [that sums-up how authoritative and exhaustive Brooks are on the subject: "I looked it up on Wikipedia".], but we cannot guarantee... "Dubbin is a wax product used to soften, condition and waterproof leather. It consists of natural wax, oil and tallow"."
Brooks got bought out and now have a bunch of corporate accountants and marketing types swarming all over them gibbering about brand value and maximising something or other; hence twelve quid for Dubbin and six and a half for a spanner: RIP OFF.