i asked the question earlier and the only reference in response was the service I mentioned.
I’m trying to piece the information together from the replies given.
do they leave Fenchurch Street?
No not fenchurch street.
But my post ref 12. is a honest account.
Morning services from colchester town are 0935 to colchester.
Same unit also does 1035 colchester town to London liverpool Street.
1135 is one from colchester town to London liverpool Street.
Ecs off colchester sidings does 1535 colchester town to London liverpool Street.
Also Ipswich is 0923 1451 to London liverpool Street.
1651 is also one but in darkness.
Southend Victoria is 1030 1050 1210 1250 1310 1330 1410 1450 1530 1610 to London liverpool Street.
Here are some examples off daylight non prm 321s due to time off year and services booked to work.
However disclaimer please don't be too disappointed iff two retanus ones turn up instead off a non prm one.
Also be wary also off a possible 720 substitute as well taking place.
Also recently vice versa had a non prm 321 on a 720 diagrammed service.
However I have given some services to choose and go from.
All you need to do is plan the workings from London liverpool Street to clacton braintree etc which form these.
However what services I have mentioned on here are correct Upto December timetable change.
Once again disclaimer subject to 720 substitute or 2x retanus 321 or even ex x2northern rail ones 3219 3224 etc instead off at least one being a ex non prm one.