The legal term `` without prejudice save as to costs '' is when a communication can not be exhibited in court until the end of the trial .
`` This is also referred to as the Calderbank formula , from Calderbank v Calderbank ( 1976 ) , and exists because UK courts have held that `` '' without prejudice '' '' includes for the purposes of costs , as in Court of Appeal , in Walker v Wilshire ( 1889 ) :   ''
Prejudice -LRB-legal term-RRB-