The early morning train departs LST at 04:30 (04:35 some days) arriving SIA 05:17 (05:29 some days) calling at Stratford only. No Sunday morning train at present due to engineering works. The late evening train departs SIA at 23:59 arriving LST 00:55 calling at Shenfield and Stratford only. This service operates 7 days a week.