my old mans got an 03 reg vectra, i looked to see where i can tighten the handbrake, can't see anywhere as the cables go up over the middle box of the exhaust.

anyone know where the adjustment for this is?

Not sure about your model but there are 2 options?

1. Look under that hand brake leaver its self?
Sometime under the Cover there is a tightener.
Remove the casing / sleeve.

2. If you cant find an adjuster then your going to have to check the Drums / Pads ?
They may need adjusting up.

Check out the sponsors page for places that can help if your really scratching you head.

Hope this advice helps?

Take a look under the hand lever brake boot , u can adajust it with a 10mm socket , if it's still poor it will need adjusting on the hand brake shoes