Tigerfish: Glasgow air ops was not constant string of chatter between the aircrew and force control. I no longer have any interaction with the unit so I don't know how frequently they speak to force control now, but I can't see how it changes anything.
There's nothing unusual in them reporting clear of a job, and then calling again as they land, after a transit back to base.
The absence of a independent, battery powered, CVR is why we don't know what was going on in the last ten minutes.