And to add to the misery, the Welwyn services are bustituted this
Sunday morning, and the Hertford services for the whole day.

That is bad. Surely the planned work should be postponed because of
the Pic line problems. Before he retired, my father worked for BR Civil
Engineers department. It was not unknown for planned engineering
possessions to be postponed or cancelled because of problems elsewhere
on the network.

Ah, but BR didn't have the sort of performance targets Network Rail have.
Common sense has gone out of the window.

Well, the engineering works at Marylebone have been cancelled in the
light of the Gerrards Cross incident...