The threat to Cyprus was risible. I recall sitting in the feeder at Strike and laughing over this dossier claim with colleagues, particularly later when the word was put about that NBC kit was being withdrawn from Cyprus in the runup to operations.
Anyone with even a basic grasp of the SCUD missile and the Iraqi attempts to upgrade it would spot that the Cyprus claim was absolute nonsense.
If anyone wants to take down the PM on this then they would have to take down the Cabinet, the Chiefs of the Defence Staff, the leader of the opposition, the heads of the Security services and the top legal bods in the Gov't, do you REALLY think that is in the least bit practicable or is actually going to happen?
It all points back to Bliar, who decided (on the basis of divine insight presumably) that there was a WMD threat and told the attorney general to write the legal opinion accordingly. Likewise, the Chiefs of Staff are fireproof as are the head spooks (with the exception of the JIC boss), as are the legal staff of the Foreign Office (including Elizabeth Wilmshurst who resigned).
Bliar can be impeached, although under current circumstances it is unlikely as it depends upon a Commons majority to proceed to the Lords. Another possible avenue is maladministration - failure to disclose the full advice of the attorney general to Cabinet, etc...
I doubt anything will happen at the moment. If pressure mounts on Iran, then things will get interesting. There is no conceivable way that Bliar will be trusted if he promotes military action - watch for many resignations among the services, and in government and public life and a massive public backlash.