We already know that this virus is most closely related to horseshoe bats, a fruit bat. We also know that the bats in China are eaten up with some 400 pathogenic viruses, including SARs variants, and that China has taken no measures to eradicate their infected bats. We also know that bat to human transmission is possible because villagers that live in the areas of bat caves have developed antibodies to some of the variants the local bats carry.
H1N1 originated in asian swine, best guess, but, could have been around back to the dinosaurs for all we know. It is a very old virus, that became more virulent when European pigs met Asian pigs. In 2009, China blamed Mexico for a H1N1 outbreak and deported all their citizens after locking them up. But the disease was imported into Mexico from infected live swine from China
https://www.theguardian.com/world/2009/may/03/china-quarantines-mexicans-swine-flu"
Hoof and mouth, or anthrax, is resident in every soil just about every where. it also has been around since dinosaurs probably. Droughts/wet seasons, increased tillage, all can provide conditions for anthrax release and growth. A virus escaped in the UK, wouldn't have affected the siberians who died from anthrax, contracting it from a defrosted caribou carcass.
https://www.cnn.com/2016/07/28/health/anthrax-thawed-reindeer-siberia/index.html
An anthrax outbreak in 2007 "released and contained in Surrey in 2007 was the advanced effluent pipes from either the Institute for Animal Health or the similar vaccine researching and producing Merial Animal Health laboratory near to Pirbright village in the county – the pipes were too old and/or insufficiently inspected..." but it wasn't a deliberate release.
https://en.wikipedia.org/wiki/2007_United_Kingdom_foot-and-mouth_outbreak
It wasn't England's first outbreak. They had outbreaks in '67 and '80. The outbreak in 2001 was traced to a filthy pig farm, who's owner " was found guilty of having failed to inform the authorities of a notifiable disease and...later found guilty of feeding his pigs "untreated waste".: https://en.wikipedia.org/wiki/2001_United_Kingdom_foot-and-mouth_outbreak
Scientists who draw ice cores for research have discovered many virus and bacteria, frozen for thousands of years, but some still able to animate. Virus and bacteria can be found in hot springs, too.
https://phys.org/news/2020-01-year-old-viruses-tibetan-glacier.html
Virus have survived for millinea whereas humans have been around for an ecological blink of an eye. Because of this, stories about viral outbreaks being a result of a nefarious lab release need to be taken with a tablespoon of salt.
We certainly don't know now whether CoVid-19 originated in a Chinese lab, whether as a result of bioweapon research or ordinary medical research. It may have. It may have instead started as an animal mutation without any human intervention. We can, however, absolutely, postively, count on the Chinese government doing everything possible to bury the orgins of CoVid-19 simply because it started in China.
And your credibility is still toast.