Services in church halls? It does, certainly, seem that ringing in Anglican churches is now realising a considerable threat.
Are there any robust systems, working together and continuously with the CofE authorities, and actively aligned with any organisations looking for rings of bells? It may be that some preservation, albeit in different locations, might save bells themselves.
It seems, from the periphery, that recruitment and retention of practitioners of the art is extremely piecemeal. I hope I will be proved wrong; however, the comparison with, say, 50 or even 30 years ago appears stark.
When I started ringing I had also been studying organ for some time. The number of organs in decent repair was high, and churches were mostly happy to have them played. The same seemed to me to be generally true for bells. Numbers of ab initio recruits, and towers where there were sufficient adept ringers and ringing teachers abounded.
In the interim, for the former, a number of factors have caused a semi-catastrophe in that the lack of support for proper services and choirs caused many (both congregants and musicians) to desert the church as a whole. 'Modern' practices arose during the 1950s and 1960s, prompted by a mis-directed view of what would stimulate increases in congregational numbers. The upshot being, allied with other factors, to drive many previously supportive individuals away from churches. For music, the misplaced addition of carpets, etc., further mitigated strongly against anyone wanting to make music in the places. (Carpet being so dampening to the acoustic as to make performance both difficult and unrewarding.)
I have noticed, in several places where enthusiasm for reordering has driven away stalwarts of the church, especially choirs, whose membership often includes those who simultaneously provide much of the person-power to make things happen in the building, who stand for PCC membership, become churchwardens, sacristans, vergers, sides-people, provision of refreshments, running fundraising events, and whom are often the largest financial contributors to the church. Once driven away, they seldom return.
The organ (not choral) world has responded by setting up methods to relocate instruments to places where they will be welcome. Initially, this was to transplant them to other, more welcoming, churches - though, often, the physical process would involved not only tonal alterations to fit the new space, but layout changes, too. More recently - over several years - instruments from this nation are snapped up by church overseas, particularly in Benelux and France. Enquirers from those places are astounded at how many neglected but easily refurbished instruments are available at relatively low cost. They cannot understand the mentality of British church custodians who voluntarily give up sought after elements of heritage. There are, in the organ world, a few builders who will actively seek redundant instruments, refurbish them, and make contact with others who wish to acquire them. These individuals perform a fine service to the presence of the 'English heritage' of instruments - even if the instruments end up in another nation. However, they are few in number, and have to sustain their main work. They enable preservation of a tradition.
It seems that bells may go the same way. Is there a similar body to that which I have described above which can act, at least, as a clearing point? Keeping a watching brief for wherever redundant rings may find a new home, and preferably an active notification policy for what and where is available, is needed. As has been noted, though, the trend for increased physical comfort on the part of congregations (and clergy) by using secular or other edifices supplied, often, with the sort of heating which produces wild changes of humidity and temperature must provide both bells, ringers, musicians, and instruments with an almost intractable problem for preservation. The organ world has such entities as BIOS (British Institute of Organ Studies) which, inter alia, has a variety of volunteers who assess and document instruments in well-known and also obscure buildings. Those especially worth preservation are provided with various certifications of aspects of special interest and significance. These, in the Anglican sense, can make destruction, etc., less easy as DACs take the certificate into account. (Perhaps some other denominations also have such bodies, but I do not know.) Dioceses, too, have, a competent adviser to the DAC, usually named as Diocesan Organ Adviser - and these individuals report to the DAC as to whether an instrument should be enabled for removal or should be maintained/rebuilt. Thus there exists at least some protection.
Perhaps there is some sharing of ideas between ringers and those organists and enthusiasts working for preservation in their own fields. I hope so - otherwise such perhaps might be instituted and coordinated.