An update to this thread.
I’m now the proud owner of a pair of Parosphromenus nagyi and a pair of P. phoenicurus. They arrived this afternoon via a similar method to the one mentioned above. This particular company charges €0.10 less per delivery and also delivers direct to the door, no need to drive for 20 minutes to a locker. They were posted in England on Tuesday and they arrived at 2.40 this afternoon (Thursday)and all were safe, well and hardly stressed. A very successful shipment.
Bill