On a serious note, after years of developing working methods where NATS has obviously been accommodating Ryanair by optimising their flights into and out of Stansted for example, and quite considerably so, I think it borders on shameful if any ATCO here is inciting an unofficial work to rule against Ryanair without notifying that airline officially in writing well in advance.
Surely no-one is suggesting unofficial action?
I don't want to be in the middle of any real Ryanair low fuel situation exacerbated by some lightning ad-hoc implemented ATCO work-to-rule thanks very much ...