Is there any updated diagrams for the 387 on GN? Checked the frequently asked section and still shows the ones for before 10th December.
Since no one else has bitten, I haven't got the diagrams in a format which I can easily reproduce on here. However, I did make a list of the outer suburban workings which happen to serve my local station. The following list therefore includes *most* of the 387 workings out of King's Cross, M-F, although there are one or two more.
2C02 0604 KX to Cambridge (1x387)
2C04 0704 KX to Cambridge (1x387)
2P04 0734 KX to Peterborough (1x387)
2C08 0904 KX to Cambridge (1x387)
2P08 0934 KX to Peterborough (1x387)
2P14 1234 KX to Peterborough (1x387)
2P16 1334 KX to Peterborough (1x387)
1P62 1650 KX to Peterborough (2x387)
2C26 1653 KX to Cambridge (1x387)
2C28 1722 KX to Cambridge (2x387)
1P66 1743 KX to Peterborough (3x387)
2C32 1822 KX to Cambridge (2x387)
1C93 1823 KX to Cambridge (2x387)
2C40 2004 KX to Cambridge (1x387)
1P78 2022 KX to Cambridge (2x387)
2C44 2104 KX to Cambridge (1x387)
1P80 2122 KX to Peterborough (2x387)
1P84 2322 KX to Peterborough (2x387)
This should give enough information that the remainder of the diagrams can be worked out via RTTT.