Yes , Oopsadaisy, you do have to declare all your present and past ailments on policies related to bank accounts.
My DH and I went to France for five days and we were insured through our bank. They wouldn’t cover him for heart condition, but we reckoned as we were only there for five days it was worth taking a chance. Second day, DH became really poorly and was admitted to hospital with heart problems.
He was hospitalised for five days and, thanks to Brexit, not all of costs were covered by EHIC As he was recovering well, the hospital wanted to discharge him, but would only do so if he was medically repatriated via ambulance from France to our local hospital near south coast of England.
Cost us £6,000.
Hospital said if he had needed surgery, we may as well say goodbye to our house !