Thank you so much guys, I am absolutely blown away by the advice and help given here!
I will definitely be looking into perfecting my equalisation technique as unfortunately no, I am not blessed with the ability to do it hands free
Mouthfill technique seems very interesting, i'll give it a good read up and give it practice in the pool with my safety partner.
We will be filming the dives so I hope to post some up here in a month

my fellow diver Ant Judge is hoping for 70-80m which I know is well within his ability and experience...that will be an epic event.
Thanks once again for all the advice from all posters!