What I believe the BOE is exploring is for each citizen to have an account with the BOE and the potential for the types of money that can be used in this parallel banking system. If we think of the financial system as plumbing, the central bank has direct pipes to banks but rarely to citizens. This is not usually a problem except when you need to do a big emergency stimulus push not having direct pipes to individuals…
QE doesn’t stimulate the economy because bonds and reserves are functionally identical as far as bank capital requirements are concerned and reducing interest rate payments is deflationary.