Using LeasePlan/SG Fleet. They have been reasonably good so far (probably just jinxed it) however just a bit slow for some of their process and communications, the quote and authorisation process was pretty straight forward but did take quite a long time for finance approvals and bits to be completed before contracts were signed. They also admitted they have been overwhelmed with NL applications for EVs and are working through a big backlog which is taking them a while to get through some of the process.
I just need to chase them now to check they are going to get around to paying the tax invoice soon now so delivery can proceed without hold ups.