The problem of one establishment out of many should never be a yardstick in judging others. For me, these banks are anti-crypto and their actions are high level of hypocrisy.
Most of these UK banks has political affiliation or connection. They will always do the bidding of the political class. The political class wants to control everything about the citizens including how they keep or save their own money. Banks like Nationwide are placing some restrictions like not allowing customers to buy cryptocurrency with debit or credit cards. They have also restricted the amount that can be transacted using cryptos. Their common excuse will be that they are protecting citizens from scams or loss of funds caused by the fall of exchanges. If the government really wants to protect its citizens from fraudulent exchanges, it should promote awareness programs that encourage citizens to use decentralized platforms to engage in bitcoin transactions. FTX will always be the defense of the government in its selfish quest to silence crypto.