The attacker allegedly punched a member of staff to the ground and kicked him in the head on Monday 18 February at 10.35pm
The victim suffered a knee injury and cut to the head.
He is now recovering in hospital.
Officers believe the person pictured may know something related to the investigation.
Anyone who recognises the man, or who has more information about the incident, is asked to contact BTP by texting 61016 or calling 0800 40 50 40, quoting reference number 686 of 18/02/19.Tags: Leytonstone, Leytonstone station
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