Great Britain does indeed have a SPR, but no-one knows how large it is nor where it is stored. It could be a single tanker docked at Scapa Flow for all I know.
The UK is basically providing political cover to Bambi here - hope we got something nice in exchange! Maybe a barbeque set for number 10?
LOL
Maybe some updated obama speeches to upload to the Queen’s ipod, or a moochelle obama exercise video