Originally Posted by
artee
It's only from PPRuNe that I learnt that some runways are renumbered from time-to-time due to magnetic North moving. You learn something every day.
If you watch the youtube I put up in the thread 'Old LHR T2' you'll see that the runway was 10L or 10R in the 1960s. It's 09 L and 09R now.