I use a company and now they've done it a few times for me I can recommend them. Do send a pm for details.
Your maintenance organisation should be able to get hold of the proper robinson crates (at a cost) and most insurers, certainly mine, insist that it is shipped in a robinson crate.
Make sure that it doesn't get to the uk on a friday afternoon as it probably won't clear customs that day and then the shippers sting you for exporbitant bonded storage costs until the monday.
Have the VAT which may be payable in ready funds to tranfer across to your shipper. Not sure if you would have to pay vat or not, is is a temporary import.
Not sure about leaving it on the N. Think you have to set a Delaware trust to own it but I don't really know what I'm talking about here.
Allow up to 40 hours labour for reassembly.
Then get fed up with weather and send it back to sunny Vegas!