I loved The Blue Raja (Hank Azaria) out of Mystery Men (1995). Sure he was really a US citizen, threw forks and didn't have any blue in his original costume, but hey, can't be perfect.
Some ideas of the same calibre:
-The Hooverer (if you don't mind a character that..., well, you know)
-Lift (lots of growth, always says "Going up!" when he grows)
-Torch (carries a big flashlight; HA and change environment)
But seriously...
-The European Robin is the national bird of the United Kingdom... so maybe a flyer from that. Cock robins are particularly bright and flamboyant.
-England's national emblem is the red rose, some possibilities there. Perhaps an alluring seductress..., but beware her thorns.
-A duo named Oxford and Cambridge, they could be twins with similar powers or partners with complimentary abilities. Lots of KS's though.