Bus Lanes.Most bus lanes may be used by cyclists as indicated on signs. Watch out for people getting on or off a bus. Be very careful when overtaking a bus or leaving a bus lane as you will be entering a busier traffic flow. Do not pass between the kerb and a bus when it is at a stop.https://www.gov.uk/rules-for-cyclists-59-to-82/overview-59-to-71
what do the signs say?
And at ther other end?