Hmmm, not sure right off hand, what's available out your end of the Pond,... here, in the States, I use GreenAll Fe-Zn-Mn-Cu +2-0-0 N,.... I know Botanicare's CaliMagic has this covered, but as you see, Ca and Mg as well-- redudndant for you, now,.. -LOL! a common frustration, finding products that are more specific to your needs, without all the extra's! They're nice for convenience, but sometimes you just need the basic stuff,... do some window shopping for products, and I'll look around too,... might be you end up with some overlap on products, but no biggie, they'll get used over time...!
I searched for ages last night and I can't seem to find what I'm looking for?