"For us any sort of accusation regarding the Russian leadership is unacceptable," Kremlin spokesperson Dmitry Peskov told journalists.
Russia has long denied any involvement in the attack on Sergei Skripal and his daughter Yulia in Salisbury and insisted it is ready to cooperate on any investigation.
"Neither Russia's top leadership nor those in the ranks below, nor any official representatives have anything to do with the events in Salisbury," Peskov said.
Britain has identified Russians suspected of Skripal nerve attack
London said responsibility for the attack went all the way up to Russian President Vladimir Putin.
On Wednesday British Prime Minister Theresa May said two Russian spies identified as Alexander Petrov and Ruslan Boshirov carried out the nerve agent attack.
"For us to have grounds to verify their identity we need to be contacted by the British side," Peskov said.
"Statements in parliament are not and cannot be considered a request," he added.
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ