In article , Nick Leverton
writes

Most of the few Advanced Stop Lines I've noticed have a short stretch of
cycle lane leading up to them on the left of the road, which should allow
cyclists to reach the front safely and legally. The DfT website also
has illustrations of an ASL with a left-turning motor lane and a central
cycle lane leading up to a full width Advanced Stop Line.

For a week or so late last year there was higher than usual police
activity at the lights at Admiralty Arch entering Trafalgar Square. When
they weren't nicking cyclists for riding on the pavement, the policemen
usually encouraged the rest of us to budge up the short stretch of cycle
lane on the left toward the ASL.

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