Simsi - 5:33 pm on Jan 15, 2013 (gmt 0)
Thanks - and for the link Klark0.
The site is responsive and has been for a while. I agree with goodroi that it doesn't need massive changes - especially where tablets are concerned - because it's relatively straightforward to do one-design-fits-all.
The key is whether dinking around with the content and even dropping elements that are less likely to appeal to mobile users - most notably text paragraphs - will hurt the existing (desktop) rankings. The design itself is dealt with.
So Klark0's post probably answers my question: if Google has a mobile bot and what that finds will only affect the rankings on mobile searches, that is what I was hoping to hear :)