Does anyone know of a (free) add-on that will send a custom email message to a member/member group when an entry is updated?
Or does anyone know of a way to do this with the standard EE setup?
UPDATE. As suggested, MX Notify Control does what I'm asking. However it appears to let you notify a group when the status of any entry in a channel changes.
After further thought I have realised I need to be able to notify particular members when a particular entry is updated (i.e. any field has changed rather than just the status - although I could work it with just the status if necessary)
I'm thinking RSS could be an option here however my user base is not going to be familiar with RSS so email would be the ideal solution.