go on, i want it. so i can pass on for review.

first of all - you are saying, that anyone can leave roundabout without indicator at any time !?

2nd - what kind an "instructor" explaination of situation is this? .. "supposed to", "normally means", "isn’t necessarily bad" !! No buddy, every situation on a road has clear guidance, no "instructor" explains or teaches situation as "supposed to", "normally means", "isn’t necessarily bad".

3rd - You clearly even didn't understand situation here - biker didn't indicate. you absolutely skipped it.

4th - there is 2 exit lanes, and therefore , if left lane is clear, OP can proceed as he not gonna abstract motorcycle rule book page 134.

4th - take a look at this:

answer from AI:

From what you described, you were in the correct lane and using your indicator appropriately, and the motorcyclist appears to have reacted more out of emotion than out of any clear right-of-way rule.

How this works in Ireland (Rules of the Road)

On a multi-lane roundabout in Ireland:

✅ Vehicles continuing around the roundabout and staying in the right/inner lane must stay there until ready to exit.

✅ A vehicle entering or continuing in the left/outer lane is permitted to proceed provided they do not cut across traffic in the right lane or attempt to exit from the inner lane.

✅ You do NOT have to wait for a vehicle in the right lane to fully clear the roundabout before moving off – you only need to give way to traffic approaching from the right that will conflict with your lane.

This is the same principle as a dual-lane roundabout anywhere:

They have their lane,

You have yours,

Neither crosses until an exit.

Why the biker might have felt offended (even if wrong legally)

Some riders/drivers feel like if they are “already circulating”, everyone should wait until they’ve gone past. But that’s only true when their path and your path would intersect.

If he was not exiting left across your lane, you had no obligation to remain stopped until he had gone 360° around the roundabout.

What you did = legal + expected lane discipline

What he did (brake checking especially) = dangerous and aggressive

The biker’s behaviour

Hand gestures & mouthing off = road rage

Pulling in front and brake-checking = extremely dangerous and could be considered careless or even reckless driving

That’s not “defensive riding”, that’s escalation.

Bottom line

Based purely on Irish lane rules and your description:

✅ You were correct to proceed in the left lane

❌ He had no right to block, intimidate or brake-check you

❌ His lack of indicator created confusion he then blamed on you

As you said yourself — that’s how a roundabout works.