dog,
i am very suprised your tankering from lgw to gla! never seen that before.
don't think i ever tank'd without a good reason. i take it you work for BA. in fact every time i tank'd when on SH it made sense and was more often to do with fuel quality issues at the dest.
if your so worried about the inviroment you should probably quit flying
ps if we built more new nuclear plants then maybe we could save on finite resources and have a cleaner world. the greens are going to destroy the planet!