THE Home Secretary's resignation became inevitable as soon as it was discovered his office was involved in fast-tracking a visa application from his ex-lover's nanny.

No longer was David Blunkett able to contend that his private life was separate from his public duties.

His downfall was precipitated by an obsession and an arrogance which called into question his ability to make judgements of the utmost importance on our behalf.

One wondered how a man so obsessed with seeking paternity rights could focus the appropriate level of attention and care to his duties in charge of the campaigns against crime and terrorism.

And one wondered how a man so arrogant that he felt able to denigrate fellow ministers could retain the trust of his colleagues and the wider public.

With his judgement in question, Mr Blunkett had no choice but to resign.

Potentially, his resignation could have a devastating impact on the Government and the fortunes of the Prime Minister.

Without Mr Blunkett, the Cabinet team which will fight the General Election in a few months' time is considerably weaker.

Mr Blunkett had an integrity which commanded a respect only matched by that for the Chancellor of the Exchequer.

Even those who opposed his policies admired his personal qualities and straight-talking.

His departure damages the trust and confidence in a party and a Prime Minister already undermined by a series of high profile resignations and the decision to go to war in Iraq.