On first inspection I thought this would be a quick repair, but through the hole created by the rust I could see some surface rust in the tubular section behind, so I cut out more than I originally planned.
So with rust converter and paint brush in hand I coated the inside as best as I could.
The new strip fitted well and I have found welding upside down has become much easier since I cleaned the wire feeding spindle in the welder, so I now get a much more consistent flow of wire.
The final job for the day was another section of the wheel arch.
This didn't take long and within 15 minutes was all fixed up.
I think the next job will be to fix the curved inner wheel arch that I was so happy with on the right hand side.