Yeah I will be getting it welded and mot isn't for a long time yet.
But is it safe to drive is the question?
Well its just going to get worse thats the only thing, you can treat it now, and use expanding foam, but when you come to weld it, it will turn into a ball ache because of all the foam etc. So kinda sticky situation

Well it is structurally weakened, personally i would drive it, but it depends how big you are on saftey etc, but tbh, welded or not i wouldnt think it would make that much differance