We have logged in to SagePay today and have the following message:
TLS 1.2 Update is coming at the end of March 2018, if you are using our 'Server', 'Direct' or 'Pi' integrations please check with your developer that you are TLS 1.2 ready.
Is this something we need to worry about with our cart? Are we TLS 1.2 ready?
That's something you would need to check with your host, as it's more a server thing than a shopping cart thing. Have a look at the thread here https://www.ecommercetemplates.com/support/topic.asp?TOPIC_ID=107642
I tried that link but it through a wobble. I've contacted our host (Heart Internet) and they've said "All of our SSL certificate supports TLS 1.2 so this should not be an issue"