Just to confirm, what Berrybrook sell is the British made QR system from Optimill.
They seem to be well liked by the Land Rover owners who this QR hub is largely targeted at, the following video shows just how short it is, even when the two halves are connected its still shorter than the original Morgan hub I'll be removing to fit the Optimill.
This is how its recovering the 10mm lost by going with a dished wheel.