A passenger travelling from Barking to Grays had his laptop stolen after leaving it on the train.

The 35-year-old boarded the Southend-bound c2c service on the evening of Thursday, January 22.

He placed his black Wenger rucksack, which contained his laptop and a number of other items, on the seat next to him.

When he got off at Grays at 11.25pm, he left his bag on the seat and the train had already continued on its journey before the man realised.

CCTV footage shows a man sat in the same carriage then picked up the bag and moved it onto another seat before rummaging through it.

He moved the bag to the floor area by the doors before leaving the train with the bag.

British Transport Police believe the man pictured could hold information that would assist their investigation and would like to speak to him.

Anyone that knows who he is or who witnessed the incident should call 0800 40 50 40, or text 61016, quoting reference ESUB/B4 of 05/03/15.