Via royal mail

A very British phrase!

"Via Royal Mail" is a way of saying that something is being sent through the postal service of the United Kingdom, which is known as Royal Mail. It's often used to indicate that a letter, package, or parcel is being sent by post, rather than by another method such as courier or email.

For example:

• "I'm sending you the documents via Royal Mail, so it should arrive within a few days."
• "Can you send me the package via Royal Mail to ensure it arrives safely?"

In the UK, Royal Mail is the official postal service, and it's responsible for delivering mail and parcels to millions of addresses across the country.