Route through a wide roundabout

[Viperz888]

Hi
There is quite a large roundabout that I use almost everyday. I'm just looking for some opinions on what route one should take to cross it (straight over).

In the photo, when coming from the North East, heading South West, the blue line shows the route I usually take, staying to the left of the road. The road is easily wide enough for 2 lanes, but isn't marked as such. Does this mean I should take the yellow (middle of the 'lane') or red (racing line)? There is an mark where the imaginary middle of the road would be, but this is just due to the way the road was laid in 2 sections.
Many drivers will try to overtake on the roundabout, and I have seen quite a few bumps at the green spot as they try to come back across (all 4 roads are all singe lane, and I'm assuming drivers to the left have priority). Should I stick out into the road to try to block this, or am I allowed to take the racing line, since it is 1 lane?
Thanks

[Viperz888]

Well thanks all for your thoughts.

However is seems someone from South Ayrshire council reads this, as they have just spend last weekend making it into 2 lanes all round. Strangely, they haven't changed the entries at all though. So it would seem that you have to be in the left lane to go straight over, as there is such a small space to merge back in, but as of yet there are no arrows on the entries stating this.

[Viperz888]

heebeegeetee said:

So does that mean that the red and yellow lines trying to collide with blue will now have to cross a white line to do so?

A dashed white line, yes.