Disco Handle's Like a Dinghy

Does anybody have any idea why my Disco is wallowing like a Dinghy in a force 10???
Before i go and spend a fortune on suspension I thought i'd ask the question..
It's fine at low speed around town, but on the motorway, get up to 70, it's like trying to ride a Rodeo Bull!!!. It seems to want to dip and weave if you touch the brakes, and overtaking is a nightmare!!
It's no sports car i know but it seems to have got real bad all of a sudden. Anybody experienced anything similar???
Any advise appreciated.

Hi

Sounds like a bush has failed on the suspension somewhere. Shouldn't be too hard to locate just a screw driver (preferably a flat head) an hour or so just go round each bush to see if one has failed, I'm fairly sure you will find one.

Charlotte

have a check on all your anti-roll bars for condition and all fittings and like charlotte says check all bushes have a good check on all your steering joints as you know theres plenty of them on a landy whatever model may as well grease prop while under there gonna be a while