Thanks Valmarg,
I have some sympathy with your neighbours only because I know how it feels to want not to lose such a lovely tree, but 15 + years is a bit excessive, in fact I'm surprised that their tree lasted that long - our disease seems to have taken hold within months - weeks even and I have to do something before it affects our neighbours lovely apple tree.
I'm a bit more encouraged if it is bacterial canker rather than honey fungus, although the surgeon is fairly convinced that neither of the trees can be saved, many of the websites I've visited seem to offer a treatment plan for this problem and I'm hoping the tree "doctor" suggests medical management rather than surgery!! Otherwise, I'll be back for advice on what I can plant that will give our bank and hedge some "character" and not be susceptible to dying on us!!!
Sunnyx