When working in Industry (1989-2000) I had the following experience.
The Halifax Bank, Wallasey, has played an active part in this operation until fairly recently (2022), though they deny their involvement.
The images on this page are clipped .jpg copies of .pdfs. They can be downloaded full size (double click). The .pdfs have been sent to 50 random MPs as well as the following: Suella Braverman; Sir Kier Starmer and Angela Eagle. No reponse has been forthcoming from any of them.