Last Workings for Mk1 Suburbans

Does anybody know what the last workings for the Mk1 suburbans were. I seem to think it may be the southern end of the ECML before electrification.
Thanks in advance.

 

I have just read your message and may be able to provide you with an answer to your request.
Just before electrification of the inner suburban service at Kings Cross I made a few notes about the service that was operating.There were still trains operating to Broad Street (DMU) and Moorgate Metropolitan Widen Lines in the Rush Hour.The Broad Street services left the Main after Finsbury Park and the Moorgate trains went via York Road on the up and Platform 14 on the down.I went to Kings Cross on 1st October 1975 and viewed the evening rush on that night.
I have some scant notes about the service from Moorgate and the following applied.
I watch the ECS trains go through York Road platform and return up no 14 platform later.Class 31s were on the loco hauled trains.One was sent down light to take the first train back.On this night it was 31189.

Departuretimes from Kings Cross of trains from Moorgate
16:19 Welwyn DMU
16:49 Welwyn Cancelled
17:00 Hertford stock 46101,46098,43140,46212,46102,46237
17:14 Welwyn Cancelled
17:19 Oakleigh Park Welwyn stock 46159,46116,46207,46119,43182,46140
17:29 Hatfield stock 46131,46165,46112,46162,43138,46203
17:41 Welwyn stock 46213,46166,46168,43123,46130,46245
17:53 Hertford stock 46215,46114,46232,43159,46099,46241
18:02 Potters Bar stock 46122,46233,46244,43195,46127,46121
18:17 Welwyn stock 46087,46147,46240,43357,46200,46210
18:21 Hertford DMU
18:26 Hatfield DMU
18:33 Hertford DMU

All loco trains were hauled by class 31.I have some numbers but that is not complete.The service to Moorgate was in the Rush and not like it is now i.e all day till early evening.
Apart from that there were also two services that opperated from the Main station on 1st October 1975
These were

17:45 to Hitchin with 48012,48001,43043,43145,43012,48009,48021,48006
17:49 to Welwyn with 43083,43046,46214,43161,46144,46155,46161

I hope this is of help.I'am afaid that is all there is as I did not go to see the Morning rush at that time.
I little new in October 1975 I would be answering a quiery raised over the internet.
Regards from an old 34B spotter.

 

Thanks for the information. I had forgotten about the Broad Street services.