poppy wrote: Hi how long roughly does a PIP assessment take? 
Hi p,
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To answer your query, if you are speaking of the actual face to face consultation (medical) itself, this can take around 40mins to an hour on average.
If you are speaking of the whole assessment process from the start to receiving a decision this can take 2-3 months.
See :
PIP Claims Guide. (2nd Link down the page) &
PIP Self Test bro58