My husband and I eloped and got married in Fort William in Scotland, just the two of us.
We hired a photographer for an hour to capture the ceremony so we had some pictures to show to friends and family. He also acted as our witness. The other witness was an off-duty registrar. But he might have been able to bring an assistant along if the registry office wouldn't have been able to provide someone.
It sounds like you will be sorted for witnesses @happygoldcars770 but just in case things don't work out, hiring a photographer could be an option. And you get the added bonus of having some photographs to relive the memories. :-)