A Royal Mail delivery vehicle drives along a road in London.
Britain's communications regulator, Ofcom, said on Tuesday it was investigating Royal Mail's failure to meet its delivery targets across 2021-22, with its probe set to look into the postal company's "substantial lapse in performance".
"Ofcom takes compliance with quality of service targets very seriously," Ofcom said in a statement.
"Our investigation ... will gather evidence to understand the reasons behind this substantial lapse in performance, and determine whether Royal Mail has breached its requirements."
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