That's the 'collect and drop' model. The cams to lay in the track can be a bit finnicky - and the bags are difficult to obtain, though you could make something suitable.
The brushes and the commutator in the pancake motor aren't always the best - and can dig in a bit where the brushes run over the breaks between the copper segments. The flywheel-effect of the rotor at speed helps overcome this, but with low-speed running, it will often stall. A bit of rounding off of the copper edges can help. This problem gets worse as the carbon brushes get shorter.....
There's surprisingly little news attention to this story - http://www.itv.com/news/update/2014-11-08/police-investigate-reckless-attempt-to-derail-a-train/ - seems to have been rather a near thing.....
Indeed, and particularly useful for 12V 'grain of wheat' bulbs - I usually run them at around 8V - a nicer light and they last for ever - two in series off a 16V supply...
Indeed, and I would have been reluctant to post this, if it hadn't come through Irish Rail itself.
I'm sure that Belmond know what they're doing, far better than I do, but it does seem very ambitious on such a small network.
This has been announced - http://www.businesswire.com/news/home/20141105006215/en/Belmond-Launch-Luxury-Touring-Train-Ireland#.VFp5HDSsV8F - it will be interesting to see what actually happens.
Will we see Mk 3s on the network again?
Bray to Dublin is still on iPlayer for some reason - http://www.bbc.co.uk/iplayer/episode/b01bqktm/great-british-railway-journeys-series-3-21-goes-to-ireland-bray-to-dublin - for those in the remains of the Empire - or with a proxy server...