At Ruislip depot, the train maintenance dispute has got the company well and truly rattled.
On Thursday, management kicked off an offensive against workers taking official (and therefore legally protected) industrial action short of strikes, singling out individuals in a bid to break the action.
They even sent the apprentices back to the training centre, saying that the depot was not a suitable learning environment for them. Here at Tubeworker, we think it sounds like an ideal learning environment - a hands-on, practical study of workers standing up for ourselves and fighting back.
Management appear to be out of their depth, not knowing what to do when faced with solid, concerted action. Perhaps the simplest thing for them to do now is to concede an honourable defeat and pay us properly for the work we do.
After all, their strategy of attempting to demoralise us has backfired, with the industrial action more determined and effective than ever.