@Carol Bewley69: If you have forgotten your Lock Screen password, then please sign in to Find My Mobile via the link below using the Samsung Account details that are registered to your Galaxy S6, and you will be able to remotely unlock the device from here.
https://findmymobile.samsung.com
For further information, please check out the handy guide below.
What is Find My Mobile and how can I use it to locate, lock or wipe my device? | Samsung UK
