Some people have misunderstood channel islands banking. The banks are historically fixed deposit taking units for onshore international banks. Many of these such banks have closed since CRS (i.e in Isle of Man) and now with negative interest rates their business model is becoming questionable. There market is now investing expats, UK resident non-domiciles and Trusts. If you are looking for a transnational account as a non-resident that is not what they are about unless you reside there. There is simply no money in wire activity for those banks. You need to be investing with them or parking money there so they can rob you︀ to pay the light bills.
P.S I went years ago on a trip to Jersey︁ to open accounts in person and walked on foot in the pooring rain between Barclays,︂ Natwest, Lloyds, Santander, RBC, Standard Bank, HSBC, NedBank and BNP etc. Barclays, Ned etc I︃ had already opened personal accounts online but wanted to see if I could do Trust︄ accounts. Results where not impressive..wasted my time 🙁