SAS-A321
121.5 seems to have become flooded with unnecessary calls like ME carriers calling eachother, PAN PANs every where in the UK, when someone lost their orientation or practicing is as someone mentioned. (Get a flight info frequency for that)
Here we go...the Guard Police are creeping out of the woodwork again.
I'm not sure how new you are to flying in the UK SAS A321 but using 121.5 is part of the flying training in the British Isles. Practice pans are just that and 121.5 is the frequency.
It's important that pilots are not scared of using it when they have a problem.
If your Scandinavian cousins had been listening out they could have saved some red faces.