I'm having a problem this afternoon getting an access code to file a clients VAT return. I've filed several MTD successfully using bridging software but today I get to the access code stage and the access code isn't coming through on the phone. The phone doesn't ring. The last three digits of the phone number shown on screen are correct. I've tested the telephone line and I can ring it from another phone and it will ring out. There is a dialing tone. I've checked service issues and nothing is listed there, I've tried to ring HMRC but the lines are all busy so I keep being cut off. Anyone got any ideas what is wrong and how I can fix it?