Interesting suggestion from SWBKCB on the basis the PSO funded Dornier/Saab340/Saab2000 mix, essentially whatever is available it would seem sits around through the day inactive yet requires two crews, that in the next PSO ITT it could be possible to increase the unit size required albeit requiring a significant step up in funding, but have a tail that works harder but based in DND.
Whether a Q400 is the right unit as commercially that may be a little too large, but an S20 could be suitable as can operate into AMS and is comparable to the INV-DUB offer. May also make for a more competitive PSO competition as may attract ATR42 options also.....
The argument as to whether DND should qualify for PSO status to any LON market let alone any other is debatable but then it has precedent so could be retained.....