The Imperial War Museum have shared their guidelines for borrowing/lending that they use for their Loans in procedure. Their Loans in policy enables the Museum to borrow items from owners, such as cultural organisations, private individuals directly or via a third party appointed by the owner and known as a lender.
Please also look at the Spectrum Loans in (borrowing objects) procedure for more information.
Click on the link on the right-hand side to download this resource as a PDF.