70000 ‘Britannia’ on 1Z71 Norwich - Windsor & Eton Riverside | The National Network 

Class 7 70000 ‘Britannia’ passing Parsonage Lane near Ingatestone on the return leg of a rail tour to Norwich. Due to delays at Marks Tey, she was running late, which was well made up for as she hurried towards London.
Please note this video was taken on a public path behind a level crossing barrier gate and aware of surroundings, do not trespass.