Brit here. I think the UN should seriously consider relocating it's offices from New York. It's really not acceptable to have the organisation held to ransom like this. I'd support Berlin, Rome or Paris as good options if one of those nations was willing to take it on. With the new high speed rail links between London and Paris coming on line soon maybe we could split the burden. I can see some good coming of this, clearly the organisation and it's members can't take funding or independence for granted and need to take them seriously.
Maybe we in Britain could contribute a bit more from the massive savings we're supposed to reap from Brexit - ho, ho.