'It seems that some years ago Church's called their oxfords (the model without any decoration) Balmoral and renamed it as Consul'
Hi Juan. Just a small but important point here: an 'Oxford' shoe is not necessarily 'without any decoration', as you describe it. It refers purely to the closed-lacing system, whereby the vamp is stitched on top of the quarters, as opposed to the opposite way round, whereby the quarters are on top of the vamp. This latter way produces an open-lacing system, which is the opposite of an Oxford, and shoes of this kind are called 'Derby'. A 'Balmoral' is traditionally an Oxford with a high top, i.e. a boot rather than a shoe (most boots are made with the open-laced system, and are thus Derbies). The Church 'Consul' is therefore a name given to a cap-toe Oxford shoe. Oxfords often have decoration (especially brogueing).
I have owned several pairs of Church shoes, and still have three. One is the Grafton, a full brogue Derby in shell cordovan, which I bought in 1989. The sole has come away from the upper, and I am not sure it is reparable. I shall take them to John Rushton in Wigmore Street to find out. I have not bought any Church shoe post Prada, however. I do still wear my almost 30-year old 'Henley' black Oxford full brogues occasionally.