Dammit. I feared that someone would ask that..."Why".
Well PART of the answer is it was a "Proof of concept" question. The idea suddenly struck me, could it be done? I tried a click or two - but didn't get a good result.
The other (slightly pathetic) part was just neatness. I would like the relevant data to start at A1 for simple ease of numbering the lines and for cut/paste options into other sheets without having to think too deeply about it.