Just got back from Plymouth, which was a 220 mile drive. Disco drove superbly. We were collecting my son and all of his clobber from University. All fitted in the back of the Disco, with 4 of us in the car. Due to late night, early morning I drove the first part, but, was too tired to carry on. My wife very kindly took over. All going well until break lights suddenly came on up ahead. My wife applied the breaks hard and the Disco started to snake across the carriageway. She held it nicely, but not a wonderful experience. When I apply the breaks lightly, no problem. I rarely have to apply hard. On this occasion, it was a concern. The back end was heavy and I wonder if this played a large part in this. Has anyone else experienced this?