Might need a bit more intense light early on to make it sturdier / more robust.
the only concern i have is that you went from a controlled environment to outside... if the sunrise/sunset doesn't match up with bloom in your region at this time of year, it's going to cause the plant to re-vege if it gets too short of a dark period at night.
As long as you looked into that detail, you'll be fine.
https://sunrise-sunset.org/search?location=london%2C+UK
The nautical info is likely better to use, as twilight and dusk provide some light. ~10hours of darkness is the more likely cutoff for causing flowering, not ~12hours you constantly see rammed down everyone's throat like a law, lol, but some plants require more. it's more of a guideline and let your plant tell you the specifics.