Personal trainer profile headshots

Hello

I am looking for a photographer to travel to the London Waterloo area,

we have approx 16 Personal trainers, we would like some head shots of them all for there profiles on the wall in the gym.

Our Iphone pics are very bad and would like something better.

it would be great to see each of there personalities and a little more casual, They are restricted to wearing a black Tee and the background must be blue.

We have a perfect Blue wall for the background in a separate room.

Let me now your thoughts and we would be looking for a max of 3-4 hours?

This may lead to other jobs with the trainers them selfs

thanks

mikey