Tom Anderson wrote:

The service could have been disrupted, and the controller may have
decided to run one, either to get a train back to time or if Olympia
has had a long interval without a train. I've known Circles to be
reformed into Hammersmith's en route before now
I was on one when it happened once: it was a circle as far as Aldgate, and
then changed; i never thought i'd be leaving Aldgate on a H+C train!

It happens every evening, although some trains change only at Edgware Road

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Lars Elmvang
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Min mailadresse finder du ved kun at skrive det overeksponerede domænenavn én gang