I think rhe price point of new arrivals is generally haphazard.
I will say it again; the going rate in London is at or about £100 per hour for a Pole GFE, £150 ph for an entry level Brit. The average is higher because of a basement effect; few girls charge less (or can make money charging less) than £80, many charge a lot more than the average.
Since The Brexit vote; or more accurately the marked devaluation in the pound and the spike in prices that followed it, Ihave seen half hour and hourly charges creep up, but I think confidence and demand is generally weak. I have seen two regulars - Nicol and Brigit - relocate West recently and both ended up offering discounts on their normal rate.
I suspect price inflation is feeding through to rents - this will be the major engine of price rises. With people, including punters, being more careful about their spending getting the pricing right is tricky. I suspect this lack of confidence is also feeding through to the buying choices of punters - leading to a shift in preference for cheaper, less exotic punts.
Punting is an extremely fluid and sensitive market. I have not seen girls looking bullish or busy recently.