Got the car back now, painted black for protection.
Hard to see the weld line but he had to make up a panel pretty much all the way from just in front of the jacking point to the wheel arch.
The weld is more visible in this image taken from below
Will be coating the bottom with stoneguard later which will cover most of it, then go over it with Silver paint when we get some dry weather.
Local guy did it for me in the end. £120.