Bus and cycle signs
With-flow cycle lane
What it means
A cycle lane running the same way as you. Where it's marked by a solid white line, you MUST NOT drive or park in it during its hours of operation. Where the line is broken, stay out unless you have no choice. Never cut across it to turn left — wait behind for a gap in the cyclists.
Highway Code Rule 140 — read it on GOV.UK
Test yourself on signs like this one
Free with an account. Each answer tells you what the sign means, not just whether you were right.