"Clearly a decision by a minister which suffers
from a total lack of proportion-ality will
qualify for the Wednesbury unreasonable epithet.
It is, ex hypothesi, a decision which no
reasonable minister could make. This is,
however, a different and severer test.
Mr Lester is asking your Lordships to adopt a
different principle - the principle of
'proportionality' which is recognised in the
administrative law of several members of the
European Economic Community. What is urged is a
further development in English administrative
law, which Lord Diplock viewed as a possibility
in Council of Civil Service Unions v Minister
for the Civil Service (1985) AC 374, 410.
In his written submissions, Mr Lester was at
pains to record . . . that 'There is a clear
distinction between an appeal on the merits and
a review based on whether the principle of
proportionality has been satisfied.' He was
prepared to accept that to stray into the realms
of appellate jurisdiction involves the courts in
a wrongful usurpation of power. Yet in order to
invest the proportionality test with a higher
status than the Wednesbury test, an inquiry into
and a decision upon the merits cannot be
avoided. . . . The European test of 'whether
the "inter-ference" complained of corresponds to
a "pressing social need"' (The Sunday Times v
United Kingdom [1979] ECHR 1; (1979) 2 EHRR 245, 277) must
ultimately result in the question 'Is the
particular decision acceptable?' and this must
involve a review of the merits of the decision.
Unless and until Parliament incorporates the
Convention into domestic law, . . . there
appears to me to be at present no basis upon
which the proportionality doctrine applied by
the European Court can be followed by the courts
of this country."