There is evidence that this virus started in several locations at similar times, just that, for whatever reasons, many countries are not looking at other possibilities because it is easier to blame China and not investigate further.
I lived in Wuhan for 5 years and left there to change job in the summer of 2019 and still know lots of people that live there. One of those Chinese friends is adamant that it was brought in from outside and refuses to listen to any other views. At first, I thought he was a little crazy with his thinking, but as time progresses I have listened to his thinking and he does have a point (he believes it was brought into China during the world military games that were staged in Wuhan in October of 2019).
The idea that people were getting ill with pneumonia-like illnesses in late 2019 and any deaths at that time would have been recorded as pneumonia or the flu, and it was only once the outbreak in Wuhan struck that the first cases were recorded, yet there is evidence of people being ill with similar cases across Europe in late 2019.
I do feel the worst of this is now over for the UK, but I do fear that if too many go on their much needed holidays abroad it will be inviting new strains into the country, or imported through visitors coming into the UK.