Bus and cycle signs
Contra-flow cycle lane
What it means
Cyclists ride towards you on your side of a one-way street, in a lane kept for them. It catches drivers out because you don't expect anything coming the other way. Where the lane is marked by a solid white line you MUST NOT drive or park in it while it's operating. Look both ways before pulling out.
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.