No, I've seen the drawing. There is no requirement for traffic on the main road to be considerate to traffic wishing to join - unless it's very slow moving/crawling traffic, when there should be consideration given to allow traffic to filter in.
You hit the nail on the head though - sufficient space to join safely. In this case, there doesn't seem to have been, as a non-speeding motorcycle was alongside Craig's car within seconds. Common sense says that you don't pull out into oncoming traffic. What would be wrong with allowing the traffic to pass? Save a few seconds, pull out on traffic which has right of way (remember, Craig was at a give way line - the clue is in the name), cause an accident. All for the sake of saving a few seconds.
Nobody is talking about legal requirements. It's about common sense, judgement and courtesy, which the motorcyclist deemed to be lacking in Craog's manoeuvre.
No Mike,
I'll disagree with your sentiments.
The law is vauge and always open to dispute, hence why you'll rarely see a poor lawyer/solicitor, so I don't think we'll have a legal answer on here, just some common sense.
As an driver with multiple valid licenses, and a considerate nature for all road users, showing due care and consideration should apply to everyone, whether you believe you have right-of-way, or otherwise.
The bike rider was in a different lane to the car driver, and therefore not at imminent risk, assuming the car driver wasn't driving erratically and moving between lanes.
If there was a constant stream of traffic in the right hand lane and nothing at all in the middle lane (actaully the left lane by default), your text suggests it would be incorrect to move out from a side junction at all, but the car on the minor road should wait until the whole carriagway is completely clear of traffic for a distance that no other road traffic would be bothered by a vehicle joining the road.
Driving articulated vehicles, cars and riding motorcycles gives many different viewpoints on road safety.
Making correct and steady progress on a road and being considerate to all others who are using the surrounding space make for happy motoring, so, for me, the bike rider wasn't in the right mental place to be riding at that particular time.
Everyone is safe, and that's really all that matters anyway.