I gots a Bravo 1.4 and it has had a pinhole oil leak in the sump ever since I got it. Now I can be arsed doing something about it, will I need to replace the whole sump pan or can it just be tacked up with a welder?

sand it down to clean bare metal around the hole then apply a good layer of liquid metal. i've used it on bigger leaks in sumps and petrol tanks than a pinhole with no problems. if the hole keeps weeping while you are applying the liquid metal you should drain the oil out then apply it, then once it has dried you can refill oil.