"Mrs Mellow, I am finding paying the business bills (approx 100 different people/month) increasingly difficult.
Lots of my suppliers are now saying cheques are not OK, they want bank transfer."
So if cheques are so good and online transfer is so bad for business, whyever would they do that?
"But my accountant who works on paper wants things done the way he wants"
Other accountants are, I suspect, available. If he works on paper, given (as you point out) VAT is all online as of next year, he's out of a job in twelve months, isn't he?
"my dad (accountant, aged 65) really struggles with the changes."
So what? There have been other, major changes to accountancy over the past 40 years, and at any time a fair number of accountants will have been 65. By that logic, there can never be any changes on the grounds that some accountants can't cope (it's 1972, we have to defer decimalisation because of elderly accountants who can't cope without shillings).