She's not running a business though, angel....it's all very suspish! Granted, it's not uncommon for companies to sell other companies clothes etc, ASOS as an example. But ASOS charge the same price as the company they are selling. If it's a French Connection dress at £100 and FC suddenly put it on sale for £40, ASOS will too. What Sophie is doing it making it look and sound like these clothes her HER clothing line, and charging an excessive amount more than the original company. That's a huge con! If Zara UK sold a jacket for £200 and Zara Spain was selling it for £100....you'd order it from Spain or never buy from them again because they were ripping you off! She's taking the piss.
I'd support her if she designed her own clothes and got them manufactured here, even with a huge turnover time. I buy kids clothes from small startups all the time - I even love that vintage look. But something is very amiss with this....I hate to say.
ETA: I've noticed she now says "Handpicked" on her insta page. I'm still not convinced.