Foreign Secretary Boris Johnson has said he wants to see "demonstrations outside the Russian embassy" over Moscow's role in the Syrian conflict, he told the Commons.
An emergency Commons debate is being held into the mounting humanitarian crisis in Syria.
Earlier, former International Development Secretary Andrew Mitchell drew parallels between Russia's actions in Syria and that of the Nazis before World War Two.
Former cabinet minister Stephen Crabb has labelled the bombings in Aleppo as a "war against children".
Speaking at an emergency debate into the humanitarian crisis in the country, the Pembrokeshire MP said: "Almost half of the casualties since the current attacks began have been children, as bombs and mortars have landed on hospitals and broken through underground bunkers which sometimes also serve as schools.
"The images that we should hold before us are the ones we've seen over the last fortnight of the lifeless, dusty, broken-limbed bodies of children being removed from bombed out buildings and piles of rubble."
The Democratic presidential candidate may also have shown his cards on his choice of running mate.
The US president also shared a post on Twitter accusing Dr Anthony Fauci of misleading the public over hydroxychloroquine.
Fears over an impending second wave of coronavirus dominates Wednesday’s front pages.