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If you are going through the tail end of amber it means you were probably approaching the junction too quickly.
https://www.highwaycodeuk.co.uk/light-signals-controlling-traffic.html
RED AND AMBER also means ‘Stop’. Do not pass through or start until GREEN shows
AMBER means ‘Stop’ at the stop line. You may go on only if the AMBER appears after you have crossed the stop line or are so close to it that to pull up might cause an accident
It appears most road users do not appreciate that amber is actually a STOP light.
Glad you are ok