Oil Leak - revisited

During the repairs needed for the MOT the mechanic tried to repair the leak in the sump.  Unfortunately, although he did quite a bit of welding/brazing he eventually had to admit defeat.  He has reduced the leak to a tablespoonful a week, so I still need the high tech solution while the garage is in the garage, but the leak is so small I think I will just live with it.

 
The only long-term solution would be a new sump and I really don't think I need to spend that amount of money just to prevent a small drip.