Maybe try keeping a decent distance behind the driver in front of you, wait for traffic to start moving before you start to move forward (edging closer to the car in front of you), try watching the cars in front so you can clearly see cars turning off of a road causing traffic to slow down, and finally trying to undertake and end up being in the wrong lane at Levenhall roundabout - that one must have been embarrassing!
Maybe try keeping a decent distance behind the driver in front of you, wait for traffic to start moving before you start to move forward (edging closer to the car in front of you), try watching the cars in front so you can clearly see cars turning off of a road causing traffic to slow down, and finally trying to undertake and end up being in the wrong lane at Levenhall roundabout - that one must have been embarrassing!