When starting to overtake you see the dividing lines ahead change to double unbroken lines. What should you do?

Do not overtake because you are not
permitted to overtake on double lines
Continue to overtake because you started when the
line was broken
Keep overtaking and cut in in front of the other car as
soon as possible
Explanation: Double white lines with an unbroken (continuous) line closer to you - you cannot overtake across these lines.
Double white lines with a broken line closer to you - you may cross the lines to overtake if the road ahead is clear.

