I thought it was rather poor. Jenny Agutter's character seemed to be nothing more than a token link to the earlier film as she was a largely irrelevant character.
The evacuation of the children from a city to the countryside was a fair enough storyline except for being set in 1944 (I assumed prior to D-Day), but although I haven't really studied the history of it so am open to correction, as far as I'm aware the only such evacuations taking place at that time were from areas affected by V1 attacks which were London and the south east. Yet the children were being evacuated from Manchester.
I suppose the real period of evacuations earlier in the war wouldn't have allowed for the presence of American troops, so this all seemed rather contrived to me.
I imagine there may have been racism in the American Army at the time, and nothing wrong with highlighting that, but I did think the involvement of the American MPs in harassing the civilians who were associating with the black soldiers a bit over the top and possibly far-fetched.
Again, I haven't researched this, but I do wonder just how many black generals there were in the US army in World War2 - just had a quick a look it appears there was ONE. Must have been him then!
On railway matters, it was surprising how little activity was taking place in Oakworth goods yard - apart from kids fooling about.