I'm looking forward to it, melv. Hopefully they will expand a bit on my earlier answer on this topic. They might tell you about the severe problems encountered with the boiler and the unforseen problems they came across with the mainframes and running gear of the 90 year old beast. They may also mention the lack of competent project management.
I imagine in 30 mins they will be a bit short on detail. If so there is more detail here:
An elderly friend of mine, who's absolutely mad about railways and steam locomotives says that the national railway museum made a bit of a Horlicks with the FS. BTW, for his 80th birthday he was given a present of driving a steam locomotive. It made an old man very happy.