So perhaps we need to get this straight; those churches which were left after the depradations of Henry VIII, mainly parish churches, continued to be used by the Church of England as parish churches. Some monastic churches like Sherborne Abbey and Tewkesbury Abbey [pictured above] were bought from the Crown by the parishioners - in Tewkesbury's case only after pressure which included the demolition of the Lady Chapel to show just what might happen if they did not pay up.
Since then, the Church of England has disposed of many of its buildings. Some are cared for by Redundant Churches bodies. Others have been sold off, to be turned into restaurants, private houses, libraries (St Peter's Oxford) and even a Hindu Temple (St Luke's Southampton). So, inalienable they are not.
The continuing ownership of the remaining parish churches, including many like Fr Ed Tomlinson's St Barnabas' Tunbridge Wells, is with the parish. This is, unltimately, because the State says so. Before the Reformation they were often almost private property - hence even now a few surviving cases where a lay Rector has the duty of maintaining part of the building, and hence too the remaining vestiges of Private Patronage. If the State were persuaded that the Church of England no longer genuinely represented or served the whole nation, then it might decide to disestablish and disendow it, and hand the proceeds out to others - while taking a large share for itself, as Henry VIII did. Edward VI made his depradations look very charitable, by endowing schools - with money he and his father had taken from numerous monastic schools and colleges. No doubt a 21st Century government would have little difficulty in persuading people that the church's money would be better spent on Hospitals or Universities.
In short, it would be to the advantage of the Church of England to hand over some of its buildings to the Ordinariate, or to rent them at a peppercorn rent, rather than give the State ideas about nationalisation. It would appear very dog-in-manger indeed were it simply to hold on to buildings for which it had no use.
Clearly there must be talk and negotiation on this important matter. In the 1970s in the Parish of Farncombe we began a sharing agreement with the local Roman Catholic church. They had asked about using our school as a Mass centre. The parish church seemed to me, Rector at that time, more appropriate. So between our 8am celebration and the later Sung Eucharist, there was a Catholic Mass. The friendship and understanding which developed between our two congregations was marvellous. It did not happen quickly; the bishops, of Guildford and Arundel & Brighton, took some persuading. Yet today, thirty years on, I understand the 'experiment' continues and flourishes. Surely we can develop solutions at least as generous for those who are leaving the Church of England, giving them somewhere to worship, and letting the Church of England proceed unhindered with women as bishops?