Teleporting overseas definitely isn't cheap, but it's not that much more expensive than a private jet, and the client has a lot of money they're willing to spend on consulting fees and wants more than she can really work on remotely.
Causal Web doesn't really have strong opinions about London - she doesn't really do much sightseeing, when she travels for work, and she's only been here for work. It has hotels with suites that suit her needs, it has self-driving cars that are straightforward to summon, it has fine internet coverage, and it has good Indian food. She's in favor of all of those things, but - it's nothing to write home about.
The case promises to at least be an interesting one. A billion-dollar multimedia company spent a lot of money to 'streamline and optimize' their advertising business and immediately suffered massive revenue losses and a couple high-profile resignations. There's allegations of malfeasance, of corporate sabotage, of shady criminal involvement.
She doesn't think it's any of those, of course. But the board wants to be sure, wants to understand what happened, and they are willing to pay a lot of money for it.