"The hurried cremation of Sturgess excludes any possibility of further investigation if, for example, new facts in the case would require the second examination or re-examination of primary data on the causes of death of the UK national. This is a serious cause for concern because the UK authorities continue to destroy any important physical evidence which they themselves somehow link with the poisoning of the Skripal family in Salisbury," the source said.
Sturgess was cremated on Monday after passing away in a hospital on July 8 as a reult of being exposed to an unknown substance.
On March 4, the Skripals were found unconscious on a bench at a shopping center in Salisbury. The United Kingdom and its allies have accused Moscow of orchestrating the attack with what UK experts claim was the A-234 nerve agent, despite not presenting any proof. Russian authorities have strongly refuted the allegations, deeming them groundless.