I think the point that 'shadows is trying to establish is whether or not LGW crew have a case in which an extra crem member could be added to the compliment (consistent with LHR) due to service failures.
Unfortunately, by doing what they have do best at LGW (making do with what they've got) they have proved that the service hasn't suffered due to less crew. The likelihood of re-instating the lost crew member is minimal as we don't get adverse feedback that can be specifically related to having one less crew member - on an aircraft that has actually taken off.