Yes, I agree 'Guest'. Gareth needs to appoint someone as a second in command to be both the conductor and inspirational influence in his absence. Why didn't he incorporate a search for such a successor as part of his project in the TV series? It would have made a lot of sense to do this so that everyone in the South Oxhey community could not feel abandoned and left in the lurch. Obviously Gareth can't do this job forever and can't commit too much time to it.
There were a few candidates who could be strong community leaders that were revealed in the programme. Could they also have been picked out as potential conductors and received extra tuition and guidance to do a half decent job in that role?
I hope that programme makers will bear this in mind in the future and besides seeking lead/solo singers they will also seek out a key figurehead that can act as conductor and a 'clone' of Gareth who has the charisma and ability to take the project forward. Here's hoping!