Of the WG's I have reached out to, all of the ones priced at 200/hour responded fast and had availability. The 100£ To 120£ hour WGs were, as a group, more unresponsive or slow in response in comparison, and seemed busier. Both groups were equally highly rated here (UKP). Have others experienced this? My theory is the WG price is elastic up to about 120-ish, then demand starts to fall off, and it falls off a cliff at 200, meaning there is a drop in the return on investment (her working hours) at 200£/hr. Is this a coincidence or have others seen this pattern? I only ask since I fly in and out from London fairly quickly at times, and if this is a pattern I might pay the premium for ease of logistical planning when every hour counts, but I wouldn't if I was in town for awhile.