SS, hmrc will tell you that proof of postage is not proof of delivery.
My accountants have made mistakes. They then waiver fees etc. Simple process.Wtf do you know about tax/vat returns dozy nosey you use an agent (your accountant) if and when he or she makes a mistake you are the one held liable for it.
Yes, I heard that on the news today. I know it's difficult to believe, but it appears that some MPs are now questioning the matter so it is remotely possible that something may be done about the problem.