If you live around South London, you can join me for yoga at the gym. 45 and 60 minutes classes.
Don't be too attached to the various and always expanding list of class denomination... Marketing can sometimes get carried away.
Just remember that Vinyasa and Power Yoga are more suited for those looking for stronger physical engagement.
Align class (Virgin Active) is a type of class with no flowing component to it but rather, longer hold of poses - a different type of challenge for both body and mind).
Regardless of the class label, you will be invited to attend to your breath, to pay attention to the sensations around your body, to be present.