Navigating Bow roundabout/flyover

It not wrong as you're within your right not to ride on the cycle lane as show in bold according to the Highway Code;

63
Cycle Lanes. These are marked by a white line (which may be broken) along the carriageway (see Rule 140). Keep within the lane when practicable. When leaving a cycle lane check before pulling out that it is safe to do so and signal your intention clearly to other road users. Use of cycle lanes is not compulsory and will depend on your experience and skills, but they can make your journey safer.

Unfortunately, the majority of drivers did not know this.