I wish they'd change the bloody, turgid British one - we atheist republican pinkoes on this side of the pond just can't sing a line of it!
That said, there's plenty of hymn-like alternatives with cracking tunes and words - I Vow to Thee My Country, Jerusalem...etc - which are vastly superior to the 18th Century political dirge we've got.
In the end, though, it has to be this!