Possibly. The rules of law regarding electronic fund transfers are located in ARS Title 47, Chapter 4A, commonly known as the UCC Art. 4A.
Frankly, it would seem doubtful that Chase is responsible for the UK bank's hold on your funds since it was you who caused the problem with the UK bank's release by either providing instructions that were not executable, or by providing insufficient information to allow the release of the funds from the UK bank to your niece. Chase is merely the payor bank to the UK bank, and they are not responsible for this initial hiccup since they performed their job by transferring the funds to the UK. However, if these problems persist much longer, you may be able to put a claim into Chase that this wire transfer has either been rejected or cancelled, and then Chase would need to work with the UK bank to recredit your account.