(1)A person shall not be prevented from presenting a petition for divorce, or the court from granting a decree of divorce, by reason only that the petitioner has at any time, on the same facts or substantially the same facts as those proved in support of the petition, been granted a decree of judicial separation or an order under, or having effect as if made under, the [1960 c. 48.] Matrimonial Proceedings (Magistrates' Courts) Act 1960 or any corresponding enactments in force in Northern Ireland, the Isle of Man or any of the Channel Islands.
(2)On a petition for divorce in such a case as is mentioned in the foregoing subsection, the court may treat the decree of judicial separation or the said order as sufficient proof of the adultery, desertion or other ground on which it was granted, but shall not grant a decree of divorce without receiving evidence from the petitioner.
(3)For the purposes of a petition for divorce in such a case, a period of desertion immediately preceding the institution of proceedings for a decree of judicial separation or for such an order as aforesaid having the effect of a decree of judicial separation shall, if the parties have not resumed co-habitation and the decree or order has been continuously in force since it was granted, be deemed immediately to precede the presentation of the petition.