1130 hrs

Trains are now able to run as normal between Grays and Upminster following a trespass incident between Chafford Hundred and Ockendon.

1050 hrs

Ockendon Lines are now open however residual delays may occur until 11.30. Check @nationalrailenq for service information.

1015 hrs

Ockendon lines are now open however residual delays may occur. Check @nationalrailenq for service information.

0945 hrs

National Rail report that a trespasser is on the line near Ockendon railway station.

Delays between Grays and Ockendon reported until 10.30am.

There has also been reports of intense police activity in the area.

We have contacted Essex Police.

More follows.