Why were banks created in medieval England?

Merchants needed a place to exchange currency from other countries

As they were created in whole Medieval Europe during High Middle Ages in that time, High Middle AGes was time of huge economic boom and many new inventions and developemnt on every field forms cientific and technological to the social life more and mroe welathier peopel become more there was silver and golden money in use and banks was needed to make keeping safe and incresing in trade easier (first banks were created by Templars)