The link to the Guardian article is in Pickard's post.
The long and the short of it is that Farage wants to block the BoE from a state run alternative to the digital currency set up by his Thai based funder (and which Farage is a shareholder in).
He is apparently prepared 'to go to prison' to stop it - not quite sure why he'd need to go to prison but he does love a bit of hyperbole with a dollop of martyrdom.
Its fine for Thai based businessman to run it, not fine for BoE to benefit from similar.
Pork barrel comes to mind.