The UTMB organisation just released a list of qualifying races to enter the UTMB. Each race gives you 1 or 2 points. You'll need to get 2 points in the last 2 years to be able to enter the UTMB. These are mostly European races, including for example the GUCR (2 points), the Fellsman (2 points) and the Thames Meander (1 point) in the UK, but missing the West Highland Way race, which is probably the most similar one ! Note that the organisers will consider adding qualifying races on request. Apparently, the American 100miles races also give 2 points.
Not much change to the previous rules (1 trail over 80km or 2 over 50km), rather a clarification of the process.

Ultra formalisation.