The latest version of the ACP (Airspace Change Proposal ACP-2021-078) for the drones gives an implementation date of June 2024(about one year late).
The drones will normally operate between 20:00Z and 05:30Z and will climb out in a resticted danger area to the north west until above FL500 and civvy traffic. They will then be free to route east as required.
Expected to be 2-3 flights per week normally.
The document shows a photo of an RQ-4 as a typical drone.
Before the RQ-4 are retired in a few years we may start seeing the replacement being used/ Speculation

Let's hope for plenty of deployments to fill in the daylight hours.
Lots of time for plans to change still
