These photos were taken near work a few days back. The sign says "Through-going cycle traffic to the left cut off. Follow(2)". The numbering system means that more than one redirection is possible at any one time.
Keep following in the direction of the signs and of course you get directed back to where you would have been if road works had not interrupted the cycle route.
As covered previously, cycle routes are generally not cut off when road works take place as it's important to maintain cycling. However, this can't always be the case, and this is the alternative.
Follow these signs to find the alternative route.
There are several other stories about road works and how they affect cyclists.