There seems to be a bit of a shortage of 197s today. However out of curiosity I just checked RTT to see where they are today and it seems out of a total fleet of 51 units we have 41 in service which I thought was about right. This includes 24 x 2 car and 17 x 3 car. Of the 10 not in service a pair appear to be going to Tyseley (197011/197016).
Of those in service we have 5 on Ebbw Vale/Maestegs, 2 on Bidston, 2 on Liverpools, 1 on Crewe Chester, 1 on Conwy Valley, 2 on Pembroke Dock, 1 on the daytime Fishguard, 4 on Holyhead to Cardiff, 8 on Manchester to North Wales and 8 on West Wales-Cardiff/Manchester, 1 on Cardiff-Fishguard (evening service), 2 on Swanline-Chester's, 1 on the Swansea/Cardiff-Manchester diagram that will be the 5th MK Diagram. Please note this info is taken from RTT at the time so some may have done other work e.g the evening Cardiff-Fishguard may have been somewhere earlier in the day.
We also have these 3 - Llandudno-Crewe (197047) Chester to Shrewsbury and Chester to Crewe (197108). Unsure if these are full diagrams or just attached to another unit for part of the day/stock movements. If we can discount those 3 as covering p'roper' diagrams then that bring the total down to 38 diagrams covered.
We appear to have a 158 covering a Cardiff-Milford-Manchester-Cardiff plus a single 153 on one of the 3 main Pembroke Dock diagrams. As well as a 150 on the one of the daytime Swanlines and a pair of 153s did the early morning FIshguard-Cardiff. All of these I believe are now booked 197s.