Yes, those were the sessions I was assuming you had in mind. I guess 'Extrapolation' had a wider (possibly US?) issue via Polydor (after the initial pressings on Marmelade) so yes, it's quite possible Miles could possibly have heard it.
Zero chance I guess of Miles ever hearing Sandy Brown's 'Hair at it's Hairiest'. (No doubt he would have had something very witty to say about the wild cover art).