The EU's appeal to Russian Federation came after Britain, the United States, Germany and France jointly called on Russian Federation to explain the military-grade nerve toxin attack in England which they said threatened Western security.
Scientists at the Wiltshire lab helped identify the nerve agent used to attack ex-Russian spy Sergei Skripal.
He is also announcing that Britain plans to spend £48 million on a new chemical weapons centre in the wake of the Salisbury attack.
"But we have world-class expertise at Defence Science Technology Laboratory (DSTL) Porton Down and today I can announce we will be strengthening this capability by investing £48m in a new Chemical Weapons Defence Centre to ensure we maintain our cutting edge in chemical analysis and defence".
Scheduled to speak at an event hosted by Policy Exchange and Rolls Royce in Bristol, Williamson will use what he describes as a growing chemical, biological, radiological and nuclear threat from some governments to announce that thousands of British troops held at high-readiness will be vaccinated against anthrax.
"In every continent of the world there are not just extremists but states willing to undermine our values, ideas, and everything we stand for", said Williamson.
However the Defence Secretary, who has been lobbying for more money for the United Kingdom military, also claimed cuts made in 2010 were based on a "naive" assessment that nation states were no longer a source of threats to the UK.
The Defence Secretary was responding to a question over the potential for a British military response against Russian Federation should relations between the two countries deteriorate further.
"This is our moment to retain our competitive advantage". "Rest assured our adversaries will be watching even more closely than our allies", Mr Williamson will say.