We applied for a 600 visa 10/11/21 and the travel exemption on 16/11/21. We received the notice of the visa request on 29/11/21 and the travel exemption a few days earlier 27/11/21. We used the same immigration agent as when we applied for our 143 contributory visa, 15/9/17.
We decided that it would be another few years before we got the 143 and wanted to make more extended visits to see the family.