Beam change troubles

[rocker8742]

Beam swap went reasonably well today up until we snapped off the bleed nipple on the brake so going to get the garage to sort the caliper out on Monday as i still have some brakes byte they're a bit light

Problem is when driving im getting a horrible noise coming from the rear wheels which is worse when going over bumps, also the car seems to be incredibly bouncy at the rear

Iv had a quick look and it seems both rear wheels are rubbing against the inner arches but I've never had the problem on the last 3 306s they've been on

Any ideas why changing the beam would cause this much difference?