Interesting article on thimerosil:
www.timesonline.co.uk/section/0,,7,00.html
(thanks tamum)
BTW if you want thimerosil free DTP for your children ask for the brand Infanrix-hib. NHS surgeries will order it in for you if you ask.
(Just as an aside I think thimerosil - or at least the DTP- was the first push towards autism for ds1).