From the report, it was hardly "very safely" - they overran the remaining runway at 62kts according to AAIB, which is non-trivial overrun speed. Depending on who you ask, 70-80 knots represents the speed at which an overrun should be considered potentially Catastrophic, which is the most severe category for a safety assessment.
Though the AAIB don't, in fact, challenge the pilot's decision.