Thanks for your replies and advice. I think you are right it really seems like the best way to go.

I am going to spend some time over the next few weeks working out what needs to be done, and how I do it and making notes then start the handover process and "pass the baton".

I think for me the hardest thing is going to be giving up that control and watching people make mistakes or do it differently to me, but I am sure I can bite my tongue and just watch and teach and help resolve the issues as they arise.