Betty Williams signed the February 2009 Early Day Motion 754: MMR Vaccine and the Media supporting the use of the MMR vaccine. The motion expressed disappointment with the reporting of the vaccine by Jeni Barnett on her LBC radio show in January 2009, and expressed the hope that future reporting of the issue of MMR would be less sensationalist and more evidence-based.
In May 2008 in the abortion amendments to the Human Fertilisation and Embryology Bill (now Act), Betty Williams voted to keep the current time limit of 24 weeks in line with the scientific and medical consensus.
Following the adverts bought by the Atheist Bus Campaign on public transport in January 2009, Betty Williams signed Early Day Motion 403 calling the adverts "religiously offensive and morally unhelpful".
Betty Williams was one of 79 MPs who signed Early Day Motion 377 noting the achievements of Charles Darwin, and calling for Darwin's birthday to be designated a public holiday to honour "one of the fathers of modern science and one of Britain's greatest, if not the greatest, scientific minds."
In January 2010, Betty Williams signed Early Day Motion 524: Recognising Climate Change which states that "this House agrees that climate change is happening and is man-made" and calls this statement a "fact, which has the support of the overwhelming majority of the scientific community".
Libel Law Reform
In March 2010, Betty Williams signed Early Day Motion 423 calling for a reform of the English libel law. The motion noted that human rights activists, scientists, writers and journalists are currently prevented from publishing, and the public prevented from reading, matters of strong public interest due to the chilling effect of the law.