Further to the previous post, I'll add some food for thought on the Bjorn situation, as this has cropped up a second time on the forum and multiple times on social media.
Universal relies heavily on a team with significant experience working in-house for major projects. That's not to say they wouldn't hire ex-imagineers (Steve Tatham did over 15 years at WDI before moving over to Universal, and Christian Hope was approached to be the SVP of Creative for Epic, having contributed significantly to DLP. Kevin Blakeney came onto Epic to do the v2 masterplan of Dark Universe, but he also has re-master planned Frontierland at Disneyland California experience on his CV).
There certainly isn't a record I can recall, however, where Universal has taken someone straight from Disney and assigned them to a major project without any form of Universal experience under their belt. Universal Creative, as does the management structure, operates so radically differently from WDI.
Bjorn is very hardwired outside of Disney into the TEA. It wouldn't surprise me if he ended up at an outsourced experience design firm with a penchant for taking ex-imagineers and Universal creatives (two of whom named above now hold significant roles in one).
I'm expecting to see someone come off the Epic and move into the UK project when the time is right.