Tresemme Naturals is pretty similar to your Body Shop conditioner, emollients (conditioning agents) and humectants (attract water), no protein or occlusives (oils/ butters). How well that works depends on your hair properties and dew points, it may be you don't have the right balance in your routine.
2a-2c, medium texture, porous/ colour treated. Three years CG, growing out mechanical and chemical damage = breakage and very high porosity. Past armpit length heading for waist.
CO-wash: Inecto coconut
Treatments: Komaza Matani, coconut oil, Hairveda Sitrinillah
Leave in: Fructis Sleek & Shine (old), Gliss ultimate volume, Inecto argan
Styler: Umberto Giannini jelly, Boots Essentials gel
Experimenting with: going back to basics