This link is very helpful and tells you what French beans did well in their 2008 trial. Luckily I bought some Musica in Homebase this week just in case my seeds didn’t work out too well. It says they are one of the top ones to grow with huge crops!
I am growing from seed Bluahide and these are not heavy croppers but have pretty flowers and purple fruit and also Sultana that I grew last year that was a heavy cropper. Happy Gardening!