Questions remain on how the £2bn shortfall in tax revenues will be funded with the most likely outcome being further borrowing.
During the Chancellor's speech last week, Mazars questioned at the time if Mr Hammond was breaking one of the "triple lock" election tax pledges in 2015. Whilst the manifesto pledge only referred to Class 1 NIC (paid by employees and employers), there was clear feeling that the spirit of those pledges had been broken. It had seemed the Chancellor had weathered the initial storm around the increases and this change of heart may be more driven by future political challenges ahead, for example around the Brexit debate and a future General Election.
Of greater concern to the self employed and business in general will be the increased uncertainty within the UK tax system and the policy that drives it.