Had a chance to get her up on a ramp and have a good look/poke about underneath. Happy to report all good under there just with some surface rust on jacking point and around these little bungs. I'm tempted to leave them out so it can drain quicker instead of dripping for hours!
As she was all good underneath and I would like to keep her that way so all stripped, cleaned and prepped before I then Rust treated, Zinc Primed, Seam Sealed and then under sealed. All the cavities have also been wax injected.