Sign reading

A sign on the Euston Road, just outside the British Library. Next building along is St Pancras International, which is a train station, the one where you get the Eurostar through the Channel Tunnel - you arrive in Paris in less than three hours, wonderful!

In case that C on the sign isn't self-explanatory ... it means that cars turning right enter the Congestion Charge zone and must pay £10 for the privilege, or a fine of £60-187. (Cars are not allowed to turn left, possibly because it's a one-way system round St Pancras.) So - carry on carrying on!