"We need to respond in a proportionate way to this aggressive behaviour from Russia and that's what we're doing," the spokesman said.
According to the spokesman, the challenges posed by Russia to the UK would last for years, though he admitted that Britain would rather have a constructive partner in Russia.
READ MORE: NATO Plotted 'Skripal Case' to Justify Their Defense Spendings — Moscow
Relations between Russia and the UK have deteriorated during the last several weeks, following the poisoning of former Russian spy Sergei Skripal and his daughter Yulia.
Skripal and his daughter have been in the hospital since March 4 due to exposure to what UK experts say is the A234 nerve agent.
The Salisbury District Hospital medical staff said that Yulia had come out of a coma, began talking and was recovering rapidly, while her father was still in a critical but stable condition.
READ MORE: Germany Views Russia as a 'Partner' Despite Diplomats' Expulsion
Following the poisoning, UK Prime Minister Theresa May accused Russia of orchestrating the attack and expelled 23 Russian diplomats.
Russia, which has consistently denied involvement in the incident, saying the accusations are baseless, expelled dozens of diplomats from the UK as well as from the states supporting the expulsion of Moscow's diplomats in a tit-for-tat response.
