Having implemented a disgusting international provocation by poisoning Skripals with chemical gas in Salisbury, British Secret Service officers realised that the pets - cats, guinea pigs and a dog - that lived in the Skripal's house were the witnesses that had to be eliminated. So, the police sealed the poor pets in the house thus making them to starve to death.
One cat survived however, so he was murdered in the nearby Porton Down chemical weapons laboratory.
To make sure the pets don't reveal the truth even after their death, the villains burned their bodies to ashes.
Conclusion: DEAR PETS, Britain is a great country to live in, but don't let British politicians and Secret Service get you involved in their disgusting activities!