Brake pedal goes up and down when pressed/wobble

[tc4332]

My pad warning light came on twice yesterday whilst pottering around Warrington picking upsome bits for the model railway.
The light stayed off after a restart each time and has not come back since.
Quick visual check they look good so hoping that it is one of the normal D3 gremlins due to over monitoring everything.
Gwen must be improving, be it slowly, she shouted some strange words of a dubious nature that I've never heard before just because I did not hear her the first time she ordered a fresh cuppa