It's not just the girls, the French people I have personally come across when I was studying in London were ridiculously arrogant and condescending to the British way of doing things. They were also incredibly cliquey, chose to only hang around other French students and only speak French. Why did you bother studying in the UK ffs.
I was in a halls that had almost majority international students, and it was interesting to observe the way foreign students adapted to life in London. The Scandinavian students were very cool and engaged well with the home students. As were the Eastern Europeans, but I think maybe because there were less of them so they put themselves out there more. But they spoke good English and were a friendly bunch. LOADS of far-eastern students (Malays, Singaporeans, HK mainly) who were also quite cliquey but weren't acting like dicks like the French who were the second biggest group after the East Asians. At least the Asians just kept to themselves and didn't annoy anyone.
All the other European students were pretty safe.