weepej wrote:
I'd be interested to know of this is actually legal, or could be construed as dangerous driving, it certainly doesn't sit with 'predicatable behaviour', and if somebody rocks up in the road you're turning right into and sticks their nose out you're in serious trouble.
Also, the guy behind shouldn't pass you or they could get done for dangerous driving, technically an undertake right?
Well interesting points, but, you are still, err wrong because, when I say 'Clear' side road it is clear - that means that as you look down the side road, to which you are going to turn into, it is empty, not probably, maybe, or only one car, but TOTALLY, EMPTY by visual clarity.
So you cannot ever have a car 'rocks up' (what ever that is, although, I assume that you mean someone, arrives quickly from that side road) which is STILL,
not going to happen because, you can see your road is clear, in the time that it takes you to COMPLETE your actions (that is to turn right, into the side road).
The guy behind you isn't going to overtake you, because he will be, too far behind, as you will have controlled, your space around you prior to your manoeuvre. Should you have a car behind you, then, you will confirm your visual que's, indicate right, start to move a little onto the white line, gently touch the brake peddle, making sure the car behind is not mistaking your manoeuvre as an overtake (very unlikely with the brake addition), continue to move out, but perhaps a little later than otherwise, but still allowing the traffic to pass you (totally legally) on your left, and do your harder, and then final and appropriate braking, in the 'oncoming lane' ...
Does that make it a little more understandable ? If not I can discect it as much as you like

No I do not agree that they would be undertaking, as such, because you are turning right, not just traveling in the oncoming lane ! You are allowed to pass someone on their left, when they are indicating and appear to be turning off.
You have probably already 'undertaken 100's of driver's, such as when someone is beginning to, or are about to, use a right turn off lane, you pass them on their near side don't you ? Haven't you? Was that illegal - no ... this is the fine art of driving and 'real driving' in practice.
Let me be quite clear here - this is not traveling in the 'oncoming lane' for any more time, than necessary, the aim is to prevent the un-necessary slow down of the cars behind you, as you turn off, that is all, and as I say ONLY if it is clear. I would never dream of doing this or ever mentioning it, unless it was totally safe to do so. As I say it is an advanced technique, and perhaps many drivers out there are not competent to make that judgement call, although personally, anyone driving, makes the same judgement calls every day in a 100 different ways ... it is just the, perhaps, unfamiliarity, that is slightly confusing or scaring you ?