The white lines across the width of the lanes where they meet the junction indicate that oncoming traffic has to give way to traffic in the junctions - the fact that the lane on the right doesnt have one shows that no traffic should be approaching the junction through there. The writing on the other end of the road is also oriented so that cars coming in the correct direction can read it.
In practice, as far as I know pretty much every road in the UK is two-way unless signage explicitly states otherwise. So you don’t really think about this as you’re driving.
I am also wondering what indicates the center of the road there. It seems to be separated by a dashed line like the other two lanes.
The white lines across the width of the lanes where they meet the junction indicate that oncoming traffic has to give way to traffic in the junctions - the fact that the lane on the right doesnt have one shows that no traffic should be approaching the junction through there. The writing on the other end of the road is also oriented so that cars coming in the correct direction can read it.
In practice, as far as I know pretty much every road in the UK is two-way unless signage explicitly states otherwise. So you don’t really think about this as you’re driving.