Miliband appeared to accuse Fink of tax evasion (illegal) in the Commons
Fink threatened to sue for defamation if this was repeated outside the Commons
BBC is now signalling that Miliband will accuse Fink of tax avoidance later today
Accusing someone of tax avoidance is no more defamatory than accusing them of driving close to the speed limits. Avoidance is not illegal.
Since both parties are still up to their eyes in peerages-for-donations and other peculations, corruptions, crookednesses and vilenesses it really is like watching bald men fighting over a comb.