The question is a perfectly reasonable one.
My thoughts:
1. Be wary at all times of someone 'flashing a driver out'. The flashing of headlights does not (under law) mean anything other than "I'm here". This despite the fact that almost all of us use it otherwise.
2. Those who have said that the car shouldn't pull out until all traffic has given way are right. So the cyclist has every right to continue.
3. Sometimes (shock horror) bicycles are hard to see, so don't be surprised at being missed in this instance. A low sun may not help at this time of year, or the fact that after dark your lights will be almost invisible next to a car's dipped beams... or your silhouette may be hidden by street furniture behind you. Even the car's pillars may partially obscure you.
4. Generally, the more people I let out into traffic, the better my day. I think there is much to be said for just being universally lovely to all other road users. So I'd stop even though you have (in the case you cite) no legal obligation to do so.
My thoughts:
1. Be wary at all times of someone 'flashing a driver out'. The flashing of headlights does not (under law) mean anything other than "I'm here". This despite the fact that almost all of us use it otherwise.
2. Those who have said that the car shouldn't pull out until all traffic has given way are right. So the cyclist has every right to continue.
3. Sometimes (shock horror) bicycles are hard to see, so don't be surprised at being missed in this instance. A low sun may not help at this time of year, or the fact that after dark your lights will be almost invisible next to a car's dipped beams... or your silhouette may be hidden by street furniture behind you. Even the car's pillars may partially obscure you.
4. Generally, the more people I let out into traffic, the better my day. I think there is much to be said for just being universally lovely to all other road users. So I'd stop even though you have (in the case you cite) no legal obligation to do so.