I am American, and so I say this from some ignorance of your society, but I know enough about the West and how it is now operating to suggest the following: we have to think outside the box that has been built for us through dumbed down education, media, politics, etc.. We live under the illusion in the West that we are in independent democracies that we must fix. We are not. We live in an oligarchy at best, a rabid capitalist kleptocracy at the obvious level, and a criteriocracy in reality, I believe.
One of the operations of this last type of rule is to keep groups in society at each other's throats, using fear and violence to turn races and ideological and religious values into weapons that serve to keep the populace divided and weak. This often happens through hits and senseless over-kill violence. A wide-focus example that everyone should be able to see: The genocidal government of Israel has been using this to great effect in the Middle East---until now, perhaps. The US is co-opted and politically owned by billionaire shadow powers like Zionists and technocrats (why else do you think there has been no accountability for Epstein crimes in the US? Epstein was in bed with both these groups). Beyond this, there are layers of puppets and masters rooted in long hallways of history...this is what has to be unmasked: you have to know who exactly you are fighting with. For example, the refugees and immigrants from the Middle East are, many of them, themselves victims of a program of aggression and destabilization on the part of Western nations serving the interests of Zionism---why does your government, like ours, allow massive, uncontrolled immigration? A destabilized world is a world in which you can traffic people and arms and money, a world ripe for speculation.
You have an economist, a brilliant woman, Ann Pettifor, who theorizes that our world is run by a gambling ring, an increasingly smaller group of speculators playing for high stakes with all our lives; Whitney Webb, the great American investigative journalist, has uncovered some of these layers and the move amongst some of these groups is also towards a world where there are a few who've achieved immortality as "transhumanists" and who have got rid of most of us as tech takes over the servile work needed for a "quality" life. There is also a great documentary about the City of London called "The Spider's Web"---this also shows you, from another perspective, the bigger web. I have listened to you a number of times and I respect your honesty and courage; I do think you may be too focused on the British milieu and therefore in a certain kind of bubble. The real issue, I've come to understand (especially after Covid), is—again—much, much larger, and we cannot understand what is happening in our own countries unless we first understand that "the Epstein class" and above do not work within any one culture...that has been a source of their strength; they use our patriotism against us; they control us by turning common people seeking a common good against each other.
Of course you are right about Chesterton and Belloc and distributism...this is the antidote to a criteriocracy, along with the strengthening of the Catholic Church; I can see quite clearly that the "catholic" nature of Christ's Church was also meant as a powerful force against the perennial conspiracy to take over the world (study the history of the Church's fight against Freemasonry and World Atheistic Communism). The Church Militant has seen the deeper, transnational enemy at work because She was meant to...and to provide a true unity amidst healthy cultural diversity.
In this particular case of Ms. Widdecombe, I know this can sound far-fetched...but I would just look instead more closely to the possibility of a government hit ordered by these shadow groups (even using interagency cooperation as is very possible in hits like this in America) of a vulnerable lady who stood up for morality; she sounds as though she was exactly the type of humble, straightforward, English person (Hobbit) who valued her local community and the common good, exactly the type of murder victim to engender confusion and friction between groups, in England especially to stoke the questions about Islamic/immigrant versus rooted English; a "thin" and frankly, moronic theory about a bookseller or random thief could be designed to generate exactly your sort of questions: again, they always need to turn groups against each other to maintain control through confusion and division.
It is a Satanic principle at work: "Solve et coagula." Christ's principle is "salve." How do we come together in Christian charity to fight the matrix?