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The group, whose 14,000 members funded the appeal, said the Inland Revenue failed to pull any surprises in last week's defence of the controversial tax measure.
"It went very well," said Susie Hughes, a PCG spokeswoman. "The Revenue failed to land a blow on us and they had nothing up their sleeve. I will not predict whether we will win or not, but we presented a strong case with sufficient enough evidence in our favour."
The PCG believes it is just a "small step" from proving that IR35 - which treats small businesses in the knowledge-based sector as disguised employees for tax and National Insurance purposes - is illegal under EU law.
A judgement on the appeal could come in late December or as late as the end of January 2002