45.
These questions were resolved in the well-known case of Webster v Mitchell. Here Claydon J in a frequently cited paragraph observed:
“The use of the phrase “prima facie established though open to some doubt” indicates I think that more is required than
merely to look at the allegations of the applicant, but something short of a weighing up of the probabilities of conflicting versions
is required. The proper manner of approach I consider is to take the facts as set out by the applicant, together with any facts set
out by the respondent which the applicant cannot dispute, and to consider whether, having regard to the inherent probabilities, the
applicant could on those facts obtain final relief. If serious doubt is thrown upon the case of the applicant he could not succeed
in obtaining interim relief, for his right, prima facie established, may only be open to “some doubt”. But if there is
mere contradiction, or unconvincing explanation, the matter should be left to trial and the right be protected in the meanwhile,
subject of course to the respective prejudice in the grant or refusal of interim relief.”
46.
In Gool v Minister of Justice and Another Ogilvie Thompson J commented that the criteria on the first branch of the enquiry leaned too heavily in favour of the applicant and
he proposed the following addition to the test:.
“With the greatest respect, I am of opinion that the criterion prescribed in this statement for the first branch of the inquiry thus
outlined is somewhat too favourably expressed towards the applicant for an interdict. In my view the criterion on an applicant’s
own averred or admitted facts is: should (not could) the applicant on those facts obtain final relief at the trial. Subject to that
qualification, I respectfully agree that the approach outlined in Webster v Mitchell... is the correct approach for ordinary interdict
applications.”
47.
The Webster test with the Gool rider has now become the accepted common law test for the standard of proof in an interim interdict and many courts have followed
it.Most recently it has been confirmed by the Supreme Court of Appeal in Simon NO v Air Operations of Europe AB and Others . For the purpose of this decision we will refer to this approach as the ‘orthodox approach’.
48.
The applicant argues that the Gool qualification is not part of our test because of the requirement in section 49C(2)(b) for an interim order to be granted if it is
“reasonable and just to do so ”. The applicant thus appears to accept Webster but not Gool. No basis for following the common law in the first instance and abandoning it in the second is given. As we point out below there
is nothing inherent in the meaning of the words reasonable and just that suggests that the balance should be tilted in favour of either the applicant or respondent.
49.
What the applicant appears to be advancing is that we distinguish between a prima facie “case” and a prima facie “right”. The distinction in classification appears to be based on the use of these terms in the Webster judgment where Claydon J identifies the prima facie case approach as one where one looks at the applicant’s case and sees if
he has furnished proof which if uncontradicted and believed at the trial would establish his right. Claydon J goes on to say that
the use of the phrase
“'… prima facie established though open to some doubt” indicates I think that more is required than merely to look at
the allegations of the applicant, but something short of weighing up the probabilities of conflicting versions is required.”
50.
Hence he arrives at the test we have discussed above.
51.