How Do I Bleed A Firebird Olympic Boiler?

Help!!!

My Tank Ran Out Of Oil, I've Had A Delivery Of Oil But Now The Boiler Will Not Fire Up. The Orange Light Is On But The Green Light Stays Off.

The Boiler Looks Very Old, The model is B/C/F OYLMPIC 50 /65. It Looks Like The White One In The Picture In The Link Below.

Any Help Will Be Really Appreciated,

Thanks
Sarah
http://www.firebirduk.co.uk/showimage.php?imagefile=/uploadimages/standard1.jpg&size=500