If you encounter a "414 Request-URI Too Large" error while attempting to link your Virgin Money Credit Card (ins_77) account it could be due to the type of device you are using. Virgin Money only supports account linking flows for Credit Card accounts on mobile devices equipped with the latest Virgin Money Credit Card app.
On desktop devices you will experience this error due to the linking process being tailored specifically for mobile platforms. In order to connect your Virgin Money Credit Card account, please ensure you are using a mobile device with the latest Virgin Money Credit Card app installed.