We got pulled up by the Soil Association inspector last month for using diluted Ecover soap to deal with aphids. We were told we could only use 'Savona' branded soap. Looked it up - they stopped selling it in the UK years ago. Called up the Soil Association again - then told to use 'Safers' branded soap. I think this comes from Canada and can't find a seller for it in the UK.
Would love to know what youz folks are using and where you get it from so I can fill in this annual plan form for our certification officer and have something in the armoury for when mealy aphid invades our brassicas in spring before the ladybirds appear.