Sheep..

Why not stand at the end of the bus lane and tell them yourself? I don't think anyone here knows where you're referring to.

As the old song goes: if you want something done right, do it yourself.

Unless you post the location, no one can really make a judgment as to whether it's reasonable or not to do.

Are they using the bus lane to go straight, so as to free up the driving lane for traffic which turns right at the junction, and so doesn't block up junctions back up the road?

Does the bus go right or straight? If it goes straight, are drives OK about letting the bus in to go straight, as they're aware they're blocking the lane, and just get upset with what you do?

"The main road ends in a right turn. The left is a BUS LANE. HUNDREDS of drivers queue in the bus lane to go straight on"

Name the junction, as what you've written here makes no sense - the road ends with a right turn but you can continue on straight - what does that even mean?

Its like parking on double yellow lines. Its legal once you have your hazard warning lights on😂

Once one does it, others will follow, yes they're like sheep. They won't want to be the outlier that gets hung out to dry while attempting to get into the left hand lane at the end of the bus lane. A bus that has taken to the right hand lane to pass the idiots in the bus lane has some chance of getting back into the left as might is right. Bus = wolf.

What is at the end of the bus lane in terms of road markings, is it clear that traffic in the bus lane should yield or is it unclear.

Exactly. Have a chat. Get it sorted.

You'll often have to encroach early into a bus lane to make a turn into a petrol station, an off ramps or to make a left turn ahead. To wait to the last second and meter is impractical and likely dangerous.

Any pedantic 'but it's the law' just demonstrates naivety and lack of common sense.

In general bus lanes are a blight on our roads. If there were a usable and fit for purpose bus service then there might be some little justification for this grab of road space off the people who actually own and paid for it.