I have accepted the offer from a organization in London.

I will be there on a Business and Commerce Visa. I was told that this visa would allow my wife also to work. I am not sure about it, can some one confirm the same.

Also what is the possibility that I can apply fro my HSMP after reaching UK and then probably change my job after a couple of years. Is this possible?

Do I have to go through a Birtish Consolate / Embassy interview for both of us for the WP?
Warm regards,
Monty