Rich here from Creative Yoga London, I've recently taken over this group and I'm working on putting a programme together! Handily enough, our main base is right next to Regents Park at the Albany Club, where we already host some of meetup's biggest and most creative yoga events and classes - such as Social Yoga Tuesdays - one of the few yoga meetups which actually is also a proper meetup as we head for a social after the class.
We already run a weekly ecotherapy (mindfulness in nature) class in the park, and as the weather improves we'll start putting regular classes back on in the park as well. Last summer we did a weekly class called 'Saturday morning: Restore!' which was a yoga class followed by optional exercise in the park - a walk or a run and it was super popular!
Practising yoga in a natural setting is super nourishing and healthy. Studio yoga can be great too, but the fresher air, absence of electromagnetic energy and the fact that you are in a much more harmonious natural environment, which is also much easier on the eye, all means your nervous system can relax another to another level!