It also claimed Skripal's niece had been inquiring after his health but that she had been ignored by the Foreign Office, and asked why no images or footage of the father and daughter in hospital had been published. Earlier, the UK Foreign Office said it was considering a request from Russia to see Yulia Skripal. She lived in Moscow and was visiting her father.
A spokeswoman for the FCO said the "rights and wishes of Yulia" will be taken into account as well as internal laws.
Yulia Skripal spent three weeks in a critical condition after she and her former spy father were exposed to Novichok on March 4. The Russian Embassy had said it "insists" on the right to see Skripal, 33, after it emerged she was improving rapidly.
An FCO spokeswoman said: "We are considering requests for consular access in line with our obligations under international and domestic law, including the rights and wishes of Yulia Skripal."
Sergei Skripal remains in a critical but stable condition in hospital.
The Russian Embassy also accused British authorities of "another blatant provocation" after an Aeroflot flight was allegedly searched by Border Force officers at Heathrow.
An embassy official suggested that the jet, which had arrived from Moscow on a scheduled return trip, had been searched in connection with the diplomatic crisis over the Salisbury spy poisoning.
The row intensified after the Kremlin ordered Britain to reduce the number of diplomats in Moscow down to the same amount that Russia has in London. In response to reports that more than 50 British diplomats would be removed, the embassy said: "It is not about expulsion of British diplomats, it is about setting the overall number of people working at UK diplomatic missions in Russia and Russian diplomatic missions in the UK on the same level."
The UK expelled 23 Russian diplomats in the wake of the poisoning. Russia has told a number of countries they must send home the same number of diplomats as they had ordered to leave their nations.