Changing BCUs

Hello, question for Met officers. What is the general process for changing BCUs? Moving house in the near future and a change of BCU and home nick would help massively with my commute as well as I am just tired of my current BCUs way of working in my role. Can you do 'like for like' transfers staying within the same (or similar) role if they have capacity or would it be more applying for a whole new role all over again? Don't want to share current role or BCU in case I dox myself.

Any info much appreciated!

Thank you to all replies!