M1 hrv buzzing and clicking felt through brake pedal when car is almost stopped have had new pads fitted 3 maths ago  any suggestions pls 

Sounds like the ABS is invoking when moving slow. 

Check the reluctor rings (toothed wheel) on the end of the driveshafts for build up of debris or grease.

Also, check the tyre sizes are the same and inflation is correct

Beyond that I would check the sensors for resistance with a multimeter and look for any damage to them and the cables leading to the sensors