Hope you can help, i have recently migrated from SharePoint 2013 to SharePoint Online so getting used to the functions and Flow.
Theres one Workflow i cant seem to get my head round building in Microsoft Flow. Please could someone help guide me through building this from the attached which is the workflow i have in SharePoint Designer. Basically what i want the system to do is recognise each time a user puts in the Contractor, and gives a unique reference for EACH contractor by updating in a separate list. This number is then pulled from this list onto the main List where the users create new items: