BIOBIZZ, they have very good organic fertz. you'll need. bio-gro, top-max, and bio-bloom. they have a growing secdual with them. they will ship to uk, and have a very good sales team wich you can contact any time and ask questions about growing. since they are based in Nl they will talk freely about whats best for your plant.
they ratios of nutes are low so you will hardly ever burn your plants as these nutes were developed with the organic cannabis grower in mind