UKC

I want to increase my flexibility over the winter months and would be grateful if someone could recommend relevant information on the internet about doing stretches that would be relevant to a middle aged climber with asperations up to E1.  I know that I can just google it but has anyone found a particular resource/video helpful?  Thanks very much.

See my comments here - pnf stretching was very effective for me. 

https://www.ukclimbing.com/forums/off_belay/hyperbolic_stretching-725884?v=...

I have found the GCN yoga for cyclist videos really useful for maintaining and improving my general flexibility. 

youtube.com/watch?v=7fv4BkJZghI&

I have found the Lattice Training stretches after wall sessions and crag days, paired with Yoga With Adriene (Youtube) on rest days have done me a world of good when it comes to mobility & flexibility, and this has paid dividends for my climbing. I've also been a fan of the GCN stuff, especially if you cycle too.