What tools are required to change the brake pads on a 2001 vauxhall vectra?

Brake caliper too - basically a hex head (Allen key) with an extension bar, get them at any auto store (can't recall the exact size). There's two bolts on the rear side of each caliper inside plastic protective tubes with end caps. Lift the car, wheels off, remove the protective caps, remove the 2 Allen bolts completely, remove a little retaining clip on the outer edge between the pads and the pads slide out (lever the caliper to spread the piston if needed). Installation of new pads is the reverse, bleed the system if needed. With practice it takes just a few minutes per side.