If it's a bike lane, it is not undertaking. It is a lane. You wouldn't blindly turn across another lane of traffic, why do you do it when it's a bike lane?

And the majority of deaths in London is due to turning transporters/trucks. They are purposely built such that the operator sits very high above and can't even see a bike or pedestrian unless it's many meters away, only by looking into one of 10 mirrors (but of course they don't). On a work site nobody moves these things unless there is an outside instructor, but on public streets we've decided to just blame whoever died. Or, if that fails, blame the infrastructure, even though we oppose any other kind of infrastructure.

What the problem is that those sort of cycle lanes conditions cyclists that its always right to undertake in any circumstances - its got to the point now in London that cyclists feel entitled to undertake at speed in stopped traffic.

That's logically impossible. Under/Over taking doesn't mean moving faster than neighboring traffic, it means "merging into slower moving traffic". If the cyclist isn't moving into the car lane, they aren't undertaking.

Not in UK terms "as I recall it from reading the highway code) its over taking slower moving traffic in the lane to your right.