Thanks Lady Tia!
The Vaishali moisturiser is nice and uses just Zinc Oxide as the spf - there is phenoxyethanol in it, which is a synthetic preservative, but this is not classed as a petrochemical, sulfate or paraben, and is used by a lot of natural cosmetic companies such as REN and Neal's Yard - not perfect, but a compromise I'm willing to make when everything else, to me, seems so right.
Cupcake, I've come across that too on the net - about physical sunscreens not being safe because of the nano particles. There is also information to say that the nano particles are safe because scientific tests have shown they don't migrate any deeper than the skin layers. To avoid the nano particle issue, of course, you just go for one of the mineral sunscreens which are not ground down as finely - the trade-off is that you'll get the whiter cast to your skin, but a price people who aren't happy about this issue are willing to pay. There is also the titanium oxide vs zinc oxide issue, with zinc oxide coming out tops in terms of deflecting the rays without generating the oxidative stress on the skin.
Artemis and Red T: you can drive yourself nuts trying to get the right product for yourself (or maybe I'm just speaking for myself lol!!), but if it works really well for you and other alternatives just aren't good for you, then just stick with what's right for you. The main thing, like you say Artemis, is to avoid getting burned, and if the product you use stops that, then that is the most important thing - and not to be lost sight of in all the information overload that's out there!! Red T, using an antioxidant cream at night is a great idea and definitely would work towards combating the 'damage' of the day.