Have you tried +44 1258 841274?
Regrettably the 'Do you fancy a trip in a Lightning' thread was pulled by the PPRuNe Godfathers. No idea why - the raffle is purely intended to benefit the Vulcan to the Sky Charity 1101948.
The only way we'll get 558 back into the air short of a major benefactor is through donations from the general public. A pity that PPRuNe clearly does not see it that way.