On a wet and rainy day you are approaching a junction with a green left filter arrow and a separate lane for left turns. What should you do before moving into the left filter lane?

Explanation

The Highway Code Rule 177 states that a green filter arrow indicates a filter lane only, and you must not enter that lane unless you intend to go in the direction of the arrow. It also advises you to give other traffic, especially cyclists, time and room to move into the correct lane. In wet weather, stopping distances are longer and visibility may be reduced, so you should check carefully and allow extra time and space for others before moving into the filter lane.