I set up a DD for VAT payment in April and the first debit should have gone through on 11th May, but didn't.
An email to HMRCs VAT enquiries office required a simple "Yes" or "No" answer. No other information was necessary, no security issues were involved.
The response was:
Thank you for your email.
For security reasons we are unable to provide any information, or carry out any actions, requested by email
If you require any further information or assistance, please contact our VAT Online helpdesk on 0845 010 8500 (international callers dial 0044 2920 501 261)
Please note that we will require a Director, Partner, Sole Trader of the business, or a person authorised to act on behalf of the business (such as an agent named on a 64-8 form), to pass security before any information can be disclosed.
All calls will be recorded
VAT Online Services Helpdesk
If they can't provide any response, why offer the email facility in the first place!!