Here is a list of the products I suggested which we use within the alpine department,

Mighty Mite (Macrocheles robustulus)
Soil borne pests, Thrip/Scarid fly  
Supplier Dragonfli

SB Invigarator
Woolly aphid/ root aphid
General insecticide, blocs reciprocals of insects. Extremely soapy so sticks best of any of these sort of products. Also acts as a plant feed if used every 2 weeks.
Generally available 

Hortisept
General horticultural disinfectant, great for sterilising 
Generally available

Amy Smethurst (She/Her)

Horticulturist
RHS Garden Harlow Carr