This morning took off flew quite well. Then as I came into land I brought the drone down to around 15 feet. Flew it towards me to bring it into me. All of a sudden it veered off to the left. The DJI AP popped up a message saying it had stopped working, the App not the aircraft. The drone went into some bramble bushes luckily I was comparatively low and very slow at the time. After getting it out of the brambles I was freezing cold so I brought it home. Luckily there was no damage it had simply got hooked on a bramble branch. One of the things I noticed immediately was on the remote there were three lights lit up. The third one blinking. But neither the green nor the red light was lit. It was out. I turned it off and on again. Still three lights and no main light. So recharged the batteries. Charged the RC unit itself. Took it all out to the garden table. Started up the drone, seemed to take ages "warming up" finally. I got the "Safe to fly" green signal. Then that message stopped. Got the scrolling red message "Remote signal too low, land immediately" (or words to that effect) then back to green, then back to red "remote signal low". I switched the whole thing off and came inside again. Its always worked well in the area I used today. Not been any problems before. The drone and the RC were just feet away from each other. Ideas??????