Those welds look like the gas is not working - either switched off, or the swan neck holes blocked, or not welding gas??? I would hit them with a hammer and see if they hold. They don't look right at all, I'm afraid!
If you can get a screwdriver under those repairs, its almost certain you will be able to prise them off very easily. Might pass an MOT with plenty of seam sealer, but welding like that in a structural area, is extremely dodgy, so make sure structural areas are done properly. Fault seems to have been caused by very low, or no gas flow at all.