Internship in London or another big city

I am a paramedic apprentice in Switzerland.

In the course of our apprenticeship, we do several weeks of internships.

Since I work in a fairly touristic region on the countryside, I would like to do two of those internship weeks in a fairly big city in the UK. This would give me the opportunity to see and act in a big city, and as a benefit, I could also improve my English anamnesis. I don't have any formal English degree, but I am fluent in everyday conversation and can "handle" our English-speaking patients.

I already reached out to some ambulance services through their regular recruitment forms. Does anyone here have a tip on where I could reach someone that could help me more direct and not just HR.