“… I do note that an arrangement was agreed on14 March 2011 for the PAYE underpayment to be collected over 36 instalments. On the31 March 2011 a letter was submitted by your agent claiming a large amount of expenses which automatically brought you within the self-assessment system. This in turn cancelled any payment arrangement you had under the PAYE system. I apologise if you were not directly made aware of this.”