Anything is possible, just look at the MI5 logo

[link to www.fas.org]

However, common purpose, from what I've seen seek to destabilise... why would TPTB (headed by the nobility) want to destabilise what has been up until recently a perfectly organised and lucrative system?

[link to www.cityoflondon.gov.uk]

The Freemasons are a red herring. Most probably from Marxist EU agents (quite possibly masons also - but perhaps playing for a different team) Pepsi vs Coke?

I don't know. But Anti-Freemasonry in the UK is BS.
They ARE the establishment, the only alternative is anarchy or the radical left EU Marxists.