The police officer, aged 28, was attacked with a machete after trying to stop a van in Coopers Lane in the early hours of Thursday morning.
He suffered injuries to his head and body but managed to taser his attacker who his colleague then arrested.
Muhammed Rodwan, 56, of Luton, has been charged with attempted murder and possession of an offensive weapon.
He is due to appear at Thames Magistrates’ Court this morning.
The officer, who has served for ten years in the Met, is in a serious but stable condition which is not believed to be life-threatening.
His family are receiving support from MPS family liaison officers.Tags: Waltham Forest, Leyton
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