Voice - and writing for two lines

Want to know my thoughts on this? Then nip over to Jessica Hart's blog. I'm guesting there this week, as part of her year celebrating FIFTY books (huge achievement - Kate Walker did it last year and Liz Fielding is also doing it this year... am guesting with Liz later but I tidied my desk and I've lost my bit of paper reminding me when I'm going over to hers, arrrgh).

We're talking about voice, and whether your voice differs if you write for more than one line. Come over and join the discussion because I'd love to know what readers and other writers think. I thought I knew what I believed... but I ended up having to revise my view!