Yield sign where on-carriageway cycle ends

When Chapel Street was recently renovated and resurfaced, new on-carriageway cycle lanes were painted. Sadly (predictably?) these lanes end just when they are most needed.
The fact that the lane ends, when cycling in a northernly direction, is in itself an annoyance.

The manner in which it ends is stupid beyond belief:
A yield sign has been painted at the end of the lane. This means, to remain perfectly within the law, cyclists riding in the lane must yield to traffic traveling in the same direction and may only proceed when there's no traffic approaching from behind.
It is legally possible to avoid having to yield by leaving the cycle lane before it ends and by riding on the main carriageway.