Colin Rosenstiel wrote:

In a wide main road like Euston Road, a bendi-bus pulls in regardless of
cyclists riding where they should, close to the kerb.

So long as it doesn't side-swipe them in doing so, I fail to see the
problem. Buses stop in bus stops. This is to be expected, and it
doesn't do any harm for other road users to assist them in doing so.

They are then
almost impossible to pass safely.

It is impossible to pass a stopped or left-turning bus (of any type)
safely on the left. There is always a significant chance of it
disgorging passengers or turning onto you. The right is the correct
place to pass, if appropriate. If the driver pulls out onto you while
doing that, he is an idiot.

The sign on the bus is only reinforcing that point.

I suggest you try it sometime instead
of pontificating.

I have done on a few occasions, and (while it didn't involve bendies)
spent a few years regularly cycling on Oxford Road in Manchester, which
has rather more buses than the Euston Road. I was only knocked into
once by a bus that pulled in a bit soon in that time; he was duly
informed of his error.

Neil