By doing so the Supreme Court has sent a clear message to the public and the Electoral Commission that electoral matters are so important that they will ignore even grave technical slips and do substantial justice in such cases. (citifmonline.com)
Convenience for witnesses and delay resulting from the decision to stay / not to stay are relevant factors that are listed in DMPA 1973, but additional factors include (but are not limited to) which court was first seised and whether substantial justice will be carried out in the alternative jurisdiction. (newlawjournal.co.uk)
the foreign judgment offends the principles of natural justice or substantial justice enshrined in the English legal system; for example, if the defendant was not given due notice of the original proceedings (with the result that judgment was obtained in default) or was not given a fair opportunity to be heard; (iclg.com)