That's great news, thanks for letting us know!
Like you, DWP cannot take this further just because they do not like the decision. They would have to find an 'Error in Law' which is not common. The first step to this would be requesting a Statement of Reasons from the Tribunal Service - you would get a copy of this too, so it cannot happen without you being aware of it.
Nothing on this board constitutes legal advice - always consult a professional about specific problems 
