Augmented reality beasties hanging around London Wall

If you wander around London Wall at the moment and peer through your smartphone’s scrying eye, you might see hidden beasts coming out to play.
This is “Harmony”, an augmented reality event that uses smartphones to superimpose fantastical creatures into the landscape, along with specially commissioned music for each of them.There’s four to look out for — a griffin hanging around inside the ruined church, a seahorse hovering over by the office block’s water feat