nah, hasn't returned and I haven't heard of any plans to bring it back. They're about to introduce their equivalent of GDPR either tomorrow or 1 July, forgotten which one, which would make it impossible to bring that letter back. Whether they follow their own rules, however, is another thing altogether 🤣
based on being the guardian of a child, or dependent of someone with a non-B, based on being the spouse of someone on an extension of stay based on retirement...all have different requirements hence the use of the guardian visa name.