“1. For a period of approximately two years from 2009 to 2011, round sum payments were being made by the Appellant with the agreement of the Respondents to cover both VAT and PAYE. It is the incorrect allocation of these payments by the Respondents that has resulted in the disputed surcharges. 2. Additionally it is understood that it is normal practice to suspend the imposition of default surcharges while agreed payment arrangements of this sort are in place.”