This very short cycle lane is the quickest way to turn right into Brooklands Avenue. You can join it at the start (Latham Road), and depending on the traffic flow, continue in the left lane until you can get into the advance stop box turning right, or change into the right lane earlier.
However, every couple of mornings, cars (or lorries) sit in the cycle lane blocking it. It seems to be if one car is in it, most are. If no cars are in it, none are.