These cover the usual arrangements in Great Britain for energy, and in England and Wales for water and council tax. Other parts of the UK work differently. Providers set their own processes too, so check the instructions yours gives you.
For TV Licence changes and cancellations, visit TV Licensing to change your address when moving home or find out how to cancel your licence.
If reading a meter is difficult for you, ask your energy supplier about the Priority Services Register — it's free, and help with readings is one of the things it covers.
Still not sure what to do next? Email [email protected] and a real person will talk it through with you.