From the ICO page https://ico.org.uk/for-organisations/guide-to-pecr/cookies-a...
This means you are unlikely to need consent for:
cookies used to remember the goods a user wishes to buy when they add goods to their online basket or proceed to the checkout on an internet shopping website; session cookies providing security that is essential to comply with data protection security requirements for an online service the user has requested – eg online banking services; or load-balancing cookies that ensure the content of your page loads quickly and effectively by distributing the workload across several computers.