Someone has asked me to mend her Links of London bracelet. I've no idea what the best quality, strongest thing would be to do this with. (They are quite chunky silver beads on it).

She also says one of the very precious heart charms on it has broken and needs soldering which I'm not too worried about but I'd hate to go through all that stress and not feel confident it was all going to hold together.

Any suggestions would be appreciated.