Peugot 206 Indicator fault?

My Peugot 206 SW (2003) has a bizzare fault. Basically when I indicate right it goes double speed and the brake lights flash on and off at the same time. It doesn't always happen but is happening much more now. The left indicator sometimes has the same problem but not as often. If I brake and inidicate together is pretty much always has a problem - both left and right!