Harry Potter filming at the station this weekend.

The Half-Blood Prince, starring Daniel Radcliffe as boy wizard Harry, will be on location overnight from Friday to Sunday.

Seargeant Christopher MacKellaich, of the British Transport Police, said: "We will have officers down at the station on Friday, Saturday and Sunday night to assist with any public order issues associated with the filming.

"They are going to be filming overnight from late evening to the early morning and we will have six or seven officers down there each night."

A spokeswoman for South West Trains said services would be running as normal and that filming would take place when trains stopped for the night.