I like the Lancashire Tory PCC candidate's message that he will be 'critical but supportive' of the chief constable. Now critical usual means that you are finding fault but Tim Ashton must be talking about the less used definition of critical as 'expressing an analysis of merits and faults'. The trouble is that even with this definition critical and supportive just doesn't make sense.
I'd put the expression 'critical but supportive' in Room 101 along with 'zero tolerance'.
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