Britishness is becoming increasingly associated with Orangeism and sectarianism.
Yes a likely side effect of the "Were out here defending the empire from the Indians on the Frontier" Since the values of these people became intrinsically associated with symbols there cultural and political identity was at threat by its dilution at the core ie in London.

with these circumstances, I'm not sure what exactly the future of Britishness (or the union) is. Will it last, will it become purely a secondary identity, does it have the roots for a revival?
Britishness is both doomed and assured at the same time for two reasons the COE is no longer the force it was and newer people have come to UK see Britishness in a differant light to a Orangeman. Until Britishness delinks from Orangeism it will be indigestible for many ordinary people in the UK it smacks of religous intolerence and that is unacceptable to most people.