You guessed it. Bitstream’s version would do the trick:
http://www.myfonts.com/fonts/bitstream/baskerville/

Ah, that's the one - thanks
(I'd looked at Fountain & Storm's versions - and Mrs Eaves - but they all had a more ornate 'w'. They might be more 'authentic' Baskervilles, but I prefer the simpler Bitstream one you've linked to...)