Lapper, for the last couple of hundred years the English subsumed their identity within the British. It was a kind of Faustian pact with Scotland in a way, when the Act of Union was signed. It is only recently with devolution, and the feeling amongst the English that they have been disenfranchised that there has been a rise in English nationalism - and I don't mean those racist thugs who claim to be nationalists.
As such, the Welsh, Scots and Irish all maintained their individual identities. The English didn't. Think about it, until recently if you asked an Englishman what his nationality was he would almost unthinkingly say "British", rather than English. Indeed, many unconsciously viewed English and British as synonymous, much to the irritation of everyone else.
Despite this, it was in a way a backhanded compliment to the other peoples of Britain - the English were saying that they were "the same as us", although understandably enough, that was not how it was perceived.
Inevitably, celebrations would be held by the Scots, Welsh and Irish for their patron saint, but the English would (possibly arrogantly) assume themselves as being above that. It is also important to note that the English make up by far the largest group in these islands, and therefore have never felt persecuted (some people's view) or overwhelmed (most people's view) by another nation.
Britain is a political construct, and as such has never truly offered an emotional attachment. The reclaiming of pride in England is merely echoing earlier times.
She's as nervous as a very small nun at a penguin shoot.