I don't think they are "happily taking" £50 per hour. If they went independent then they would obviously have to up their rates to include at the very least accommodation for their incalls or travel expenses for outcalls.
Ok not happy but content.
Also you mentioned yourself the reason why the majority of girls in Newcastle charge £100 per hour is solely due to the agencies forcing them to.
If Diamonds weren't there it would be £150 / hour here too.
So why if all the girls here are content with £100 as an independent, £50 as an agency must this be the only city in England with this price structure.
Why can't other cities adopt the same scheme? (obviously this price scheme would be terrible for the Escorts as they want the most money for the littlest amount of work, I am meaning why can't they for the punter?).
Most pass these costs onto the client
That is true, every single girl I have saw charges £20 more for an outcall. As do the agencies too.
£20 is steep, its £3.50 for a bus or £3 for metro day pass; and that will cover all their other appts for the day too!
Petrols expensive but not £20 for a 10 mile radius expensive (most girls only see people in a 10m radius)