Yes, legally it's straight ahead or left, but in practice it slows everything down. If those two lanes turn into a single lane on the other side of the junction then driving two lanes into it isn't going to be any faster - it can only be slower due to the merging friction. And that's ignoring the hazard to cyclists in the left lane. I believe most roads weren't designed for the level and variety of traffic we have today.
Yes, legally it's straight ahead or left, but in practice it slows everything down. If those two lanes turn into a single lane on the other side of the junction then driving two lanes into it isn't going to be any faster - it can only be slower due to the merging friction. And that's ignoring the hazard to cyclists in the left lane. I believe most roads weren't designed for the level and variety of traffic we have today.