Like I said earlier, I'm talking about the routing ANY PERMITTED,
not †ANY PERMITTED (otherwise I wouldn't have posed the question in
post #50). In
post #16 of this thread dan_atki states that ANY PERMITTED and NOT UNDERGROUND are effectively the same routing as far as journeys to
London Thameslink stations are concerned so my question still stands.
Yes but 'Barbican Und' and 'Moorgate Und' are NOT 'London Thameslink' stations (which are dealt with differently compared to the Moorgate branch) - tickets are issued to those stations directly.
Judging by the wording copied from FRPP above, your ticket is not marked in such a way it is obvious it is not valid on the underground. Or, put a different less confusing way: the ticket does not forbid you to travel on LU based on the wording on it.
+ is normally only used (I believe) for cross-London transfers whereby there is a NR leg of the journey at the start and end and Tube somewhere in the middle. Try looking at say London Waterloo to Zone U1 Londn and see the routeing offered (Via LU/DLR) with no +. So because your journey here may be ending with LU, no cross is shown.
Personally I believe that if that ticket isn't valid on LU between ZFD and ZMG then that's rather poor considering you could wait all day for the train when there's a train 10 metres behind you at Farringdon every 3 minutes! Of course we all know, though, that matters are hardly logical.
Still it was mentioned somewhere else (can't remember where though and in fact may have been you who said it) about continuation of season tickets to ZMG after closure of the Moorgate branch - that to me at least suggests that LU are accepting such tickets on their services.
To be completely honest with you I don't see why your ticket to Barbican Und would fail to open the barriers there even at 1200 off an LU service - LU and FCC share the same barriers at ZFD, ZBB, and ZMG.
You could try it once and see what happens - if it is deemed invalid ask them where it says on the ticket 'FCC only' or 'Not Underground' (which, in fairness, should be enough) and then further bamboozle them by saying you believe the 'Und' in the destination made you further believe it was valid on LU. (Ok we both know 'Und' refers to the fact the station is operated by LU but you could plead completely ignorant about that). Alternatively contact FCC for advice.
My feeling is, though, your ticket is valid on LU between ZFD and ZMG (no point changing anywhere other than Farringdon really).